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Apple iPhone 15 Pro and 15 Pro Max Review: Love at First Zoom

Apple’s iPhone 15 Pro and 15 Pro Max are defined by their refinements: a lighter body made from titanium, a USB-C port for charging and fast data transfers, a processor capable of console games and, on the Pro Max, a new 5x telephoto zoom camera.

I’ve reviewed and tested iPhones for years, but Apple’s new iPhone 15 Pro Max is the first time I’ve ever been this enamored. (The iPhone 12 Mini is a close second.) Both phones, along with the iPhone 15 and 15 Plus and new Apple Watches, are now available in stores.

I tested the iPhone 15 Pro and 15 Pro Max for five days, but it wasn’t until I was photographing a bodega cat named Kit Kat that I realized just how many improvements these phones have. They are brimming. After I took Kit Kat’s picture, I saw the option to turn his image into a portrait mode photo. It’s a minor detail but one with a significance: Nearly any photo can now be a portrait photo. And this isn’t even the biggest addition.

Apple gave its Pro models a glow-up with a refreshed lighter build, a new shortcut button and the world’s smallest processor. And it did all this while managing to keep that tried-and-true iPhone aesthetic front and center. In my time reviewing both phones, I recorded videos of penguins swimming, played the console game Resident Evil Village on the 15 Pro, gave the 15 Pro Max’s new zoom lens a spin atop a San Francisco Ferris wheel and tried, absentmindedly, to put a Lightning cable into the new USB-C port. Old habits, am I right?

iPhone 15 Pro Max

The iPhone 15 Pro and 15 Pro Max are defined by their refinements. This pair of phones is one of the most compelling releases from Apple in years.

But all this comes at a cost. While the 15 Pro costs $999 (£999, AU$1,849), the same price as the 2017 iPhone X, the barrier of entry for the 15 Pro Max is $100 more than it was last year. Apple got rid of the cheapest 128GB storage option leaving the $1,199 model with 256GB of storage as the new baseline. And that’s a price right on par with Samsung’s Galaxy S23 Ultra.

If you’re curious about the other phones Apple is launching, check out CNET Senior Editor Lisa Eadicicco’s review of the iPhone 15 and 15 Plus.

Pricing and storage comparison

Phone Storage US price UK price Australia price
iPhone 15 Pro 128GB $999 £999 AU$1,849
iPhone 15 Pro 256GB $1,099 £1,099 AU$2,049
iPhone 15 Pro Max 256GB $1,199 £1,199 AU$2,199
iPhone 15 Pro 512GB $1,299 £1,299 AU$2,399
iPhone 15 Pro Max 512GB $1,399 £1,399 AU$2,549
iPhone 15 Pro 1TB $1,499 £1,499 AU$2,749
iPhone 15 Pro Max 1TB $1,599 £1,599 AU$2,899

iPhone 15 Pro design embraces titanium and USB-C

The new titanium body is lovely, light and easy to hold thanks to its ever-so-slightly rounded edges. It feels less bulky than the straight-edged 12, 13 and 14 series. In fact, it’s almost like Apple merged the curved sides of the X, XS and 11 families with the blocky sides of recent years to find a Goldilocks-style middle ground with the 15 Pro and 15 Pro Max. That said, most people will likely put a case on the phone and not notice these changes at all.

There are two more major changes to the body. The first is the inclusion of a USB-C port instead of the Lightning port found on previous models. While the move definitely made headlines even before Apple announced it, in reality it’s not a radical change. I now plug in a USB-C cable (which comes with the phone) instead of a Lighting one. But it’s convenient to use the «one ring to rule them all» of charging cables.

Then there are the buttons. The volume buttons feel a bit more springy than the buttons on previous stainless steel Pro models. It’s like wearing a pair of foam-soled sneakers, where you get that extra spring in your step, rather than the airbag cushioning we had in shoes like the Nike Air Max back in the ’80s and ’90s. Both are comfortable, but the newer design with foam is more so.

iPhone 15 Pro Max

Goodbye mute switch, hello action button

The mute (or silence) switch is gone and replaced with an action button. By default it lets you silence your iPhone, but you can also customize it to turn on the flashlight, record a voice memo and open the camera, among other things. I especially liked having it open the camera. Once the app is open, the action button doubles as a physical shutter button to take a photo. But the simple fact that I can use the button to trigger a shortcut multiplies its possibilities.

The button only reacts to two kinds of input: a tap or a press. It can only trigger one feature at a time which seems limiting. I do hope that Apple opens this up and lets people program multiple presses and taps to trigger different presets. Like maybe two presses in a row launches a shortcut and one press silences the phone. Right now, the only way to change what the button does is to go into the Settings app, scroll down to the action button and change it there. Also I’d welcome the ability to add a Control Center button that gets me into this action button menu quicker.

Read more: This Is the Only Way You Should Turn On Your iPhone Flashlight

Like last year’s 14 and 14 Plus, the 15 Pros have a completely redesigned interior that makes it easier to repair. If the back glass is damaged, it should be faster and more affordable to have it replaced. Below is a comparison of how much it costs to replace the back glass on the new phone versus older Pro iPhone models.

Back glass replacement cost

Phone iPhone 15 Pro iPhone 15 Pro Max iPhone 14 Pro iPhone 14 Pro Max
Cost $169 $199 $499 $549

iPhone 15 Pro and iPhone 15 Pro Max

iPhone 15 Pro Max’s 5x zoom

Let’s just get this out of the way. The zoom lens on the small Pro is different from the one on the big Pro Max. The 15 Pro has a tried and true 3x telephoto camera like previous models. But the 15 Pro Max has a new 5x telephoto camera that’s made with multiple prisms and some clever engineering.

In contrast, there are a number of Android phones with periscope-style telephoto lenses that use a single prism to bounce light to the sensor, like the 10x zoom on the Samsung Galaxy S23 Ultra. The advantage to Apple’s design is that the lens takes up much less space and allows the image sensor to sit parallel with the lens, eliminating the restriction of having a telephoto image sensor that’s limited in size by the thickness of the phone.

Both Pro phones also have a larger 48-megapixel sensor on the main camera, which helps improve performance in low light. When I was photographing with the iPhone 15 Pro Max and 14 Pro Max after dusk, I noticed that the newer phone didn’t have to go into night mode as much. Also the photonic engine, Apple’s fancy-pants name for photo processing, seems to help with highlights more.

Take a look at some of my favorite photos that I took with the iPhone 15 Pro and 15 Pro Max.

A photo of a box office at a movie theater
Two great people
A photo of a boring clam
A cat in a window
People dancing
An iPhone 15 Pro taking a portrait

iPhone 15 Pro Max cameras vs. Pixel 7 Pro, Galaxy S23 Ultra

To test the versatility of these cameras, I decided to do a studio photo shoot with my CNET colleague, Abrar Al-Heeti, an award-winning journalist and connoisseur of tea parties. I grabbed photos of Abrar with the Pixel 7 Pro, Galaxy S23 Ultra, iPhone 15 Pro Max and iPhone 15 Pro. I did my best to frame her the same way for each phone.

Three portraits of Abrar
Three portraits of Abrar

Of the five photos, the 10x zoom photo from the S23 Ultra is my least favorite. The Pixel’s photo made the background dark and smoothed out the paper’s textures and flaws behind Abrar. In terms of her skin, both the iPhone 15 Pro and 15 Pro Max skewed her complexion warmer while retaining the most detail.

The Samsung’s 3x optical zoom shot looks wonderful, but has a heavy amount of skin smoothing, which some people prefer. And the Pixel did the best at accurately capturing Abrar’s skin in terms of color and detail. Again, all of these photos are good. However, the 15 Pro Max and Pixel images are my favorites.

Two portraits of Abrar
Two portraits of Abrar

I also decided to take the 15 Pro Max, the Pixel and S23 Ultra up on a Golden Gate Park Ferris wheel in San Francisco. It was overcast and there was fog (ah, San Francisco summers!), and those conditions challenged all three phones. But the Galaxy S23 Ultra was at even more of a disadvantage.

While the Pixel 7 Pro and iPhone 15 Pro Max both have a 5x optical zoom, in order to match it on the S23 Ultra, I set it to 5x digital zoom and, as you can see below, the results weren’t great. The Pixel fared better, but notice the detail in the trees looks muddy compared to what the iPhone grabbed. None of these photos are great but the iPhone’s snap is the best of the three.

Three photos of the University of San Francisco
Three photos of the University of San Francisco

But wait, Samsung has something the other phones don’t: a 10x optical zoom. It gets much closer. The quality isn’t great, but it looks better than the iPhone 15 Pro Max’s 10x digital zoom. The Galaxy S23 Ultra photo is fighting against that fog and the contrast is heavy-handed.

A photo of the University of San Francsico
A photo of the University of San Francsico

Also if, like me, you’re wondering what that building is, it’s the University of San Francisco. But at the time I didn’t know. So I used the iPhone’s Visual Lookup tool to find out. While the iPhone did identify it as a landmark, it couldn’t actually tell me what it was. In fact, it shared a photo of Sa’at Tower in Iran. So, I hopped on my Pixel, used Google Lens, and found out correctly that it was the university, which adds up since I live in San Francisco, not Iran.

Changing a photo's focal point on the iPhone 15 Pro Max

iPhone 15 Pro portraits are a no brainer

Then there’s portraits in photo mode which let you take a regular photo and change it to a portrait mode pic after the fact for certain subjects (humans, dogs and cats). Here’s a photo I took of Kit Kat the bodega cat in photo mode. Remember him from the beginning? I can turn portrait mode on, adjust the aperture to keep his whiskers in focus and even apply portrait lighting effects.

iphone-15-pro-max-kit-kat-portrait

But I can also change focus after the fact. Check out the ’90s grunge band photos of me and my pal Beacham. I can change the focus from me to him after I take the photo. This is going to be a killer feature for parents.

I’m also happy to say that the new lens coating on the 15 Pro and 15 Pro Max helps reduce light source reflections. On the whole if there is a reflection or lens flare it’s minimal at best and usually a single point.

A photo of people walking at sunset

In night mode, I did get some strange light streaking when using the 5x telephoto camera on the 15 Pro Max with string lights and a lamp inside a bar. I wonder if it has something to do with the prisms used for the lens. But to be clear, out of the hundreds of photos I’ve taken only three had these streaks.

A night mode photo of a sidewalk with string lights
A night mode photo of a bar

Video recordings look good. I’m excited about being able to record in log format, which makes footage look flat with desaturated colors. Recording in log gives more leeway to make iPhone videos match the color with footage from other cameras you use, versus baking in the color into the video file. I can see using Apple log videos for films where you’re using multiple cameras from different brands or in social media videos, like the one we made for this review.

Playing Resident Evil Village on an iPhone 15 Pro

The iPhone 15 Pro is the next gaming console

The brain behind everything on the 15 Pro and 15 Pro Max is the new A17 Pro chip. Its processing and graphics performance is best shown off with video games. And I’m not talking about Candy Crush.

The 15 Pro and 15 Pro Max support full console games like Resident Evil Village, which I got to test… well, at least the beginning. Resident Evil Village looks phenomenal on the 15 Pro Max’s screen, especially in terms of the lighting and shading. In my time, and through my casual gamer’s eyes, I was impressed. It speaks volumes that games like this can come to the iPhone.

I’m not even a week into using the new iPhones, so I still need to run CNET’s array of battery drain and charging tests. But I can share how the battery has fared so far. For the most part the 15 Pro Max’s battery made it through a full day of use (from 7 a.m. to 10 p.m) usually ending the day with 20 to 25% to spare. On perhaps the most demanding day I spent with the phone (taking photos, recording videos and with the screen at max brightness) the 15 Pro Max started out with a full battery in the morning and had 7% left by the end of the day.

I did run a wired charging test with both the 15 Pro and Pro Max. I used the included USB-C cable that comes in the box and a Twelve South 20-watt wall charger. Over 30 minutes the 15 Pro’s battery went from 4% to 66% and the 15 Pro Max recharged from 7% to 56%. Both phones support wired charging up to 27 watts which I plan to test and will update this review with the results.

The iPhone 15 Pro and 15 Pro Max also support 15-watt wireless charging via MagSafe or Qi2. I tested both on a Belkin BoostCharge Pro stand. Over 30 minutes, the 15 Pro went from 30% to 52% and the 15 Pro Max went from 7% to 28%, which are remarkably similar results.

iPhone 15 Pro Max in StandBy mode

The iPhone 15 Pro is home for iOS 17

If the A17 Pro chip is the brains, then iOS 17 is the 15 Pro and 15 Pro Max’s soul. The new OS is filled with lots of small quality of life improvements throughout. StandBy mode has won me over. I love being able to have my lock screen show the time in alarm clock-size numbers, app widgets or photos while it charges. The interface is clean and contemporary and breathes new life into the iPhone.

I also love making custom stickers from photos and live photos in Messages. It makes communicating with friends and family even more expressive. Autocorrect on the keyboard works so well for me. I’m usually a horrible phone typist, but this new autocorrect gets me. And I don’t even curse that much.

Read more: iOS 17 Review: StandBy Mode Changed My Relationship With My iPhone

At the end of the day, I am impressed with the iPhone 15 Pro and 15 Pro Max. I recommend both for anyone coming from a 12 Pro, 12 Pro Max or older. If you’re trying to decide between the 15 Pro and the 15 Pro Max, that 5x telephoto on the Pro Max is compelling. But if you don’t take a lot of zoomed in photos, it might be best to stick with the smaller Pro size. Also, if you’re considering buying either phone there are a number of trade-in discounts you should consider.

iPhone 15 Pro specs vs. iPhone 15 Pro Max, Google Pixel 7 Pro, Galaxy S23 Ultra

iPhone 15 Pro iPhone 15 Pro Max Google Pixel 7 Pro Galaxy S23 Ultra
Display size, tech, resolution, refresh rate, brightness 6.1-inch OLED; 2,556×1,179 pixels; 120Hz adaptive 6.7-inch OLED; 2,796×1,290 pixels; 120Hz adaptive 6.7-inch OLED display, QHD+ (1,440×3,120 pixels), 120Hz refresh rate, 1,500-nit brightness 6.8-inch AMOLED; 3,088×1,440 pixels; 120Hz adaptive
Pixel density 460 ppi 460 ppi 512 ppi 500 ppi
Dimensions (inches) 2.78 x 5.77 x 0.32 in 3.02 x 6.29 x 0.32 in 6.4 x 3.0 x 0.3 in 3.07 x 6.43 x 0.35 in
Dimensions (millimeters) 70.6 x 146.6 x 8.25 mm 76.7 x 159.9 x 8.25 mm 162.9 x 76.6 x 8.9 mm 78 x 163.3 x 8.9 mm
Weight (grams, ounces) 187 g (6.6 oz) 221 g (7.81 oz) 212g (7.5 oz) 234 g (8.25 oz)
Mobile software iOS 17 iOS 17 Android 13 Android 13
Camera 48-megapixel (wide), 12-megapixel (ultrawide), 12-megapixel telephoto (3x optical) 48-megapixel (wide), 12-megapixel (ultrawide), 12-megapixel telephoto (5x optical) 50-megapixel (main), 12-megapixel (ultrawide), 48-megapixel (telephoto) 200-megapixel (wide), 12-megapixel (ultrawide) 10-megapixel (telephoto) 10-megapixel (telephoto)
Front-facing camera 12-megapixel 12-megapixel 10.8-megapixel 12-megapixel
Video capture 4K 4K 4K 8K
Processor A17 Pro A17 Pro Google Tensor G2 Qualcomm Snapdragon 8 Gen 2 for Galaxy
Storage 128GB, 256GB, 512GB, 1TB 256GB, 512GB, 1TB 12GB RAM + 128GB, 256GB, 512GB 8GB + 256GB; 12GB + 256GB; 12GB + 512GB; 12GB + 1TB
Expandable storage None None None None
Battery Undisclosed; Apple claims up to 23 hours of video playback (20 hours streamed) Undisclosed; Apple claims up to 29 hours of video playback (25 hours streamed) 5,000 mAh 5,000 mAh (45W wired charging)
Fingerprint sensor None (Face ID) None (Face ID) In-display In-display
Connector USB-C USB-C USB-C USB-C
Headphone jack None None None None
Special features 5G (mmw/Sub6), Action Button, Always-On display, IP68 rating, MagSafe, Dynamic Island, 5x optical zoom (120mm equivalent),satellite connectivity, eSIM, Thread networking technology 5G (mmw/Sub6), Action Button, Always-On display, IP68 rating, MagSafe, Dynamic Island, 5x optical zoom (120mm equivalent),satellite connectivity, eSIM, Thread networking technology 5G, Magic Eraser, Photo Unblur, Real Tone, Face Unblur, Long Exposure Mode, Action Pan; Hold For Me, Wait Times, Direct My Call Live Translate, 5G (mmw/Sub6), IP68 rating, wireless PowerShare to charge other devices, integrated S Pen, 100x Space Zoom, 10x Optical Zoom, UWB for finding other devices
US price off-contract $999 (128GB, $1,099 (256GB), $1,299 (512GB), $1,499 (1TB) $1,199 (256GB), $1,399 (512GB), $1,599 (1TB) $899 (128GB + 12GB) $1,200 (12GB/256GB)
UK price £999 (128GB), £1,099 (256GB), £1,299 (512GB), £1,499 (1TB) £1,199 (256GB), £1,399 (512GB), £1,599 (1TB) £849 £1,249 (12GB/256GB)
Australia price AU$1,849 (128GB), AU$2,049 (256GB), AU$2,399 (512GB), AU$2,749 (1TB) AU$2,199 (256GB), AU$2,549 (512GB), AU$2,899 (1TB) AU$1,299 AU$1,949 (12GB/256GB)

How we test phones

Every phone tested by CNET’s reviews team was actually used in the real world. We test a phone’s features, play games and take photos. We examine the display to see if it’s bright, sharp and vibrant. We analyze the design and build to see how it is to hold and whether it has an IP-rating for water-resistance. We push the processor’s performance to the extremes using both standardized benchmark tools like GeekBench and 3DMark, along with our own anecdotal observations navigating the interface, recording high-resolution videos and playing graphically intense games at high refresh rates.

All the cameras are tested in a variety of conditions from bright sunlight to dark indoor scenes. We try out special features like night mode and portrait mode and compare our findings against similarly priced competing phones. We also check out the battery life by using it daily as well as running a series of battery drain tests.

We take into account additional features like support for 5G, satellite connectivity, fingerprint and face sensors, stylus support, fast charging speeds, foldable displays among others that can be useful. And we of course balance all of this against the price to give you the verdict on whether that phone, whatever price it is, actually represents good value. While these tests may not always be reflected in CNET’s initial review, we conduct follow-up and long-term testing in most circumstances.

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Tariffs Explained: Latest on Trump’s Shifting Import Tax Plan, and What It Means

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Apple, I’m (Sky) Blue About Your iPhone 17 Air Color

Commentary: The rumored new hue of the iPhone 17 Air is more sky blah than sky blue.

I can’t help but feel blue about the latest rumor that Apple’s forthcoming iPhone 17 Air will take flight in a subtle, light-hued color called sky blue.

Sky blue isn’t a new color for Apple. It’s the featured shade of the current M4 MacBook Air, a shimmer of cerulean so subtle as to almost be missed. It’s silver left too close to an aquarium; silver that secretly likes to think it’s blue but doesn’t want everyone else to notice.

Do Apple employees get to go outside and see a real blue sky? It’s actually vivid, you can check for yourself. Perhaps the muted sky blue color reflects a Bay Area late winter/early spring frequent layer of clouds like we typically see here in Seattle.

«Who cares?» you might find yourself saying. «Everyone gets a case anyway.» I hear you and everyone else who’s told me that. But design-focused Apple is as obsessive about colors as they are about making their devices thinner. And I wonder if their heads are in the clouds about which hues adorn their pro products.

Making the case for a caseless color iPhone

I’m more invested in this conversation than most — I’m one of those freaks who doesn’t wrap my phone in a case. I find cases bulky and superfluous, and I like to be able to see Apple’s design work. Also, true story, I’ve broken my iPhone screen only twice: First when it was in a «bumper» that Apple sent free in response to the iPhone 4 you’re-holding-it-wrong Antennagate fiasco, and second when trying to take long exposure starry night photos using what I didn’t realize was a broken tripod mount. My one-week-old iPhone 13 Pro slipped sideways and landed screen-first on a pointy rock. A case wouldn’t have saved it.

My current model is an iPhone 16 Pro in black titanium — which I know seems like avoiding color entirely — but previously I’ve gone for colors like blue titanium and deep purple. I wanted to like deep purple the most but it came across as, in the words of Patrick Holland in his iPhone 14 Pro review, «a drab shade of gray or like Grimace purple,» depending on the light.

Pros can be bold, too

Maybe the issue is too many soft blues. Since the iPhone Pro age began with the iPhone 11 Pro, we’ve seen variations like blue titanium (iPhone 15 Pro), sierra blue (iPhone 13 Pro) and pacific blue (iPhone 12 Pro).

Pacific blue is the boldest of the bunch, if by bold you mean dark enough to discern from silver, but it’s also close enough to that year’s graphite color that seeing blue depends on the surrounding lighting. By comparison, the blue (just «blue») color of the iPhone 12 was unmistakably bright blue.

In fact, the non-Pro lines have embraced vibrant colors. It’s as if Apple is equating «pro» with «sophisticated,» as in «A real pro would never brandish something this garish.» I see this in the camera world all the time: If it’s not all-black, it’s not a «serious» camera.

And yet I know lots of pros who are not sophisticated — proudly so. People choose colors to express themselves, so forcing that idea of professionalism through color feels needlessly restrictive. A bright pink iPhone 16 might make you smile every time you pick it up but then frown because it doesn’t have a telephoto camera.

Color is also important because it can sway a purchase decision. «I would buy a sky blue iPhone yesterday,» my colleague Gael Cooper texted after the first rumor popped online. When each new generation of iPhones arrive, less technically different than the one before, a color you fall in love with can push you into trading in your perfectly-capable model for a new one.

And lest you think Apple should just stick with black and white for its professional phones: Do you mean black, jet black, space black, midnight black, black titanium, graphite or space gray? At least the lighter end of the spectrum has stuck to just white, white titanium and silver over the years.

Apple never got ahead by being beige

I’m sure Apple has reams of studies and customer feedback that support which colors make it to production each year. Like I said, Apple’s designers are obsessive (in a good way). And I must remind myself that a sky blue iPhone 17 Air is a rumored color on a rumored product so all the usual caveats apply.

But we’re talking about Apple here. The scrappy startup that spent more than any other company on business cards at the time because each one included the old six-color Apple logo. The company that not only shaped the first iMac like a tipped-over gumdrop, that not only made the case partially see-through but then made that cover brilliant Bondi blue.

Embrace the iPhone colors, Apple.

If that makes you nervous, don’t worry: Most people will put a case on it anyway.

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Astronomers Say There’s an Increased Possibility of Life on This Distant Planet

Using the James Webb Space Telescope, astronomers are working to confirm potential evidence of life on a distant exoplanet dubbed K2-18b.

Astronomers are nearing a statistically significant finding that could confirm the potential signs of life detected on the distant exoplanet K2-18b are no accident.

The team of astronomers, led by the University of Cambridge, used data from the James Webb Space Telescope (which has only been in use since the end of 2021) to detect chemical traces of dimethyl sulfide (DMS) and/or dimethyl disulfide (DMDS), which they say can only be produced by life such as phytoplankton in the sea. 

According to the university, «the results are the strongest evidence yet that life may exist on a planet outside our solar system.»

The findings were published this week in the Astrophysical Journal Letters and point to the possibility of an ocean on this planet’s surface, which scientists have been hoping to discover for years. In the abstract for the paper, the team says, «The possibility of hycean worlds, with planet-wide oceans and H2-rich atmospheres, significantly expands and accelerates the search for habitable environments elsewhere.»

Not everyone agrees, however, that what the team found proves there’s life on the exoplanet.

Science writer and OpenMind Magazine founder Corey S. Powell posted about the findings on Bluesky, writing, «The potential discovery of alien life is so enticing that it drags even reputable outlets into running naive or outright misleading stories.» He added, «Here we go again with planet K2-18b.Um….there’s strong evidence of non-biological sources of the molecule DMS.»

K2-18b is 124 light-years away and much larger than Earth (more than eight times our mass), but smaller than Neptune. The search for signs of even basic life on a planet like this increases the chances that there are more planets like Earth that may be inhabitable, with temperatures and atmospheres that could sustain human-like lifeforms. The team behind the paper hopes that more study with the James Webb Space Telescope will help confirm their initial findings.

More research to do on finding life on K2-18b

The exoplanet K2-18b is not the only place where scientists are exploring the possibility of life, and this research is still an early step in the process, said Christopher Glein, a geochemist, planetary researcher and lead scientist at San Antonio’s Southwest Research Institute. Excitement over the significance of the research, he said, should be tempered.

«We need to be careful here,» Glein said. «It appears that there is something in the data that can’t be explained, and DMS/DMDS can provide an explanation. But this detection is stretching the limits of JWST’s capabilities.»

Glein added, «Further work is needed to test whether these molecules are actually present. We also need complementary research assessing the abiotic background on K2-18b and similar planets. That is, the chemistry that can occur in the absence of life in this potentially exotic environment. We might be seeing evidence of some cool chemistry rather than life.»

The TRAPPIST-1 planets, he said, are being researched as potentially habitable, as is LHS 1140b, which he said «is another astrobiologically significant exoplanet, which might be a massive ocean world.»

As for K2-18b, Glein said many more tests need to be performed before there’s consensus on life existing on it.

«Finding evidence of life is like prosecuting a case in the courtroom,» Glein said. «Multiple independent lines of evidence are needed to convince the jury, in this case the worldwide scientific community.» He added, «If this finding holds up, then that’s Step 1.»

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