Technologies

First moon samples in over 40 years may alter lunar history

«Our current views need readjustment» about how long our beloved white globe remained warm and volcanically active, says a researcher.

In late 2020, a Chinese space capsule delivered fresh moon samples to Earth for the first time in about four decades, and these precious lunar rocks just revealed a new detail about our planet’s glowing companion: Its volcanoes were alive and active considerably longer than scientists thought.

«All our experience tells us that the moon should be cold and dead 2 billion years ago. But it is not, and the question is, ‘Why?'» said Alexander Nemchin, a professor of Geology at Australia’s Curtin University and author of the analysis published Thursday in the journal Science.

Alongside an expansive and international team of researchers, Nemchin discovered that some of the newly transported moon rocks contain lunar fragments from later days of the white orb’s timeline. Dated about two eons ago, these fragments are relatively young. But here’s the kicker: Those same pieces are also remnants of a volcanic eruption.

Connecting the dots, the team members realized they were looking at solid confirmation that the lunar surface was alive pretty late in the game.

«We need to dig deeper with this,» Nemchin remarked. «We are highlighting that our current views need readjustment — further research will tell how dramatic this readjustment should be.»

Welcome back, lunar research

The saga began last year in December, when China’s Chang’e 5 mission sent a spacecraft to scrape the surface of the moon and collect a variety of rock and dust samples for Earth-based analysis. It returned with about 4 pounds (2 kilograms) of extraterrestrial material.

The year 1976 marks the last time lunar samples were brought down to our home planet, an achievement of the Soviet Union’s Luna 24 mission. But before that, NASA’s Apollo missions were running the course from Earth to the moon several times — the crusades returned photographs, moon rocks and personal anecdotes of astronauts.

«There was some need and drive to do this 50 years back,» Nemchin explained. «Then, priorities changed and everybody moved to something else.» But now, he says, «we have the moon back in the focus.»

He notes lunar research is important not only from an astronomy perspective, but also because any effort to travel to the moon — or really, any space exploration — tends to expedite technologies that ultimately benefit us on Earth.

One example of such serendipitous tech comes from Australian physicists’ research in the ’90s. They developed a highly complex mathematical tool hoping to detect smeared signals of black holes that vanished in the cosmos. Unfortunately, they never found any — but their invention paved the way for modern-day Wi-Fi.

Moon rock science

«Every new sample gives us a big boost in understanding what is happening, simply because we still have so few of them,» Nemchin remarked. «Apollo samples have been worked on for the last 50 years and are still actively investigated.»

While analyzing the rocks brought back by Chang’e 5, Nemchin and fellow researchers first checked out what types were present. In particular, they were after basalt fragments, which are correlated with volcanic activity.

«We needed to get an idea about chemical composition of the fragments to be able to compare [them] to the large basaltic field visible from the orbit,» he said. «And, make sure [those] fragments represent this field of basalts and do not come from somewhere else.»

Then, the scientists confirmed specific ages of the pieces of interest. Validating that these fragments are young was one of the main goals of the mission. That’s how the team members expected to prove their hypothesis of the moon having active volcanoes more recently than textbooks suggest.

«All basalts we had before are older than 3 billion years,» Nemchin said. «We also had a few very young points determined from material ejected by very young impacts — impact melts — but nothing in between. Now we have a point right in the middle of the gap.»

Such age determinations are called crater counting, something the team hopes to continue doing in the future in order to attain the full array of rocks to map out each generation of the moon. Nemchin also notes that a few interesting chemical features were found in the basalt samples, including high iron content, which isn’t present in any other retrieved pieces of the lunar surface.

Further chemical research on the rocks, he says, will help answer new questions introduced by the team’s novel findings, such as searching for the source of heat that led to lunar volcanic activity a couple of billion years ago.

And at the end of the day, the Australian geologist emphasizes that «what is important for me in all this is that we managed to bring a large international group of people to work on the sample.»

«Somehow,» he added, «In the current situation when international travel is still rather restricted, I had more interaction with different people than in the previous years when we could move around any way we liked.»

Technologies

I Used to Tell People Wi-Fi 7 Routers Were a Waste of Money. CNET’s Lab Data Just Proved Me Wrong

Technologies

My Camera Test: Comparing the $499 Pixel 10A With the Galaxy S25 FE, Motorola Edge

The Pixel 10A’s cameras are similar to those on the 9A, but it still performs quite well compared to other phones in its price range.

Google’s $499 Pixel 10A uses nearly the same cameras as last year’s Pixel 9A, but I wanted to see how its photos directly match up to its midrange Android rivals: the $650 Samsung Galaxy S25 FE and the $550 Motorola Edge.

I traveled with all three phones around St. Petersburg, Florida, checking how flexible each was in different environments, from bright outdoor settings to an indoor coffee shop and an evening brewery. All three environments can be challenging for the small image sensors on each phone.

While I find the cameras on all three phones to have different strengths and weaknesses depending on the setting, I’m quite impressed with how the Pixel 10A keeps up. In my tests, the photos include lots of detail, even though certain settings appear to involve a lot of processing to improve them.

Wide and telephoto cameras

Starting with photos taken on the sidewalk in downtown St. Petersburg, I notice that all three phones handle bright sunlight slightly differently, especially how it’s depicted on the street.

For the Pixel 10A, the sun provides a slight exposure mark over the Bay First sign at the top of the frame, but it remains fairly cordoned off to focus on the rest of the streetscape. Zooming in, you can see the Century 21 location, but the street is captured in the most detail, with the phone’s camera maintaining its natural gray color.

For both the Galaxy S25 FE and the Motorola Edge, the sun has a more pronounced effect on the rest of the image. The pavement’s color is notably brighter. I also find both the S25 FE and the Edge have slightly more clarity on the business signs on the Bay First building, including the aforementioned Century 21 logo.

Since the S25 FE and the Edge each include a telephoto camera that supports 3x optical zoom, I took a photo at that zoom with each phone. The Pixel 10A uses digital zoom on the phone’s 48-megapixel wide camera, but a lot of the scene’s detail remains preserved.

The Pixel’s zoom photo provides a clear view of the 7th St N sign, the trees and the plants. However, if you look further back at the next intersection, you’ll notice that the 7th St S sign and the Colony Grill are much harder to see. It’s those smaller details that are captured by the S25 FE and the Edge, both aided by telephoto cameras, making them more visible.

Of the three zoom photo examples, I feel like the S25 FE has the best color reproduction while also retaining details like the signs further back. Even though the photo was taken with the S25 FE’s 8-megapixel telephoto camera rather than its 50-megapixel wide camera, the colors remain complementary when comparing the 1x to the 3x. Meanwhile, the Edge’s 10-megapixel telephoto camera looks quite a bit different from the 50-megapixel wide camera — the whole image has a more yellowish hue.

Ultrawide cameras

Moving inside the Southern Grounds coffee shop, I decided to use the ultrawide cameras to capture my sausage, egg and cheese on toast. The three photos came out wildly different.

The Pixel 10A’s 13-megapixel ultrawide and S25 FE’s 12-megapixel ultrawide have a more balanced set of colors and details, in my opinion. The wheat toast appears lighter in the Pixel’s photo than in the darker hues captured by both the S25 FE and the Edge.

When zooming into my notebook, however, the Pixel and S25 FE captured more of the page markings, details that blur together more in the photo taken by the Edge. While the Edge’s 50-megapixel ultrawide camera is a higher-spec number, I noticed it had a harder time distinguishing toast levels, giving more of it a darker look. If I hadn’t eaten it myself, I’d have thought it was burned based on the Edge’s photo.

Night photography

Moving over to a nighttime setting, I used the three phones to take photos outside of 3 Daughters Brewing. I felt like all three did a decent job at producing the colors of the building, but they differ in how they handle light sources.

Both the Pixel and the S25 FE tone back the glare produced by the various lighting fixtures. Meanwhile, the Edge’s photos show noticeable streaks that dominate the sky. When inspecting the photos more closely, I find that the Galaxy captured a sharper view of the furniture, like in the Connect 4 set next to the blue chairs in the center of the frame. The same details are visible in the Pixel’s and the Edge’s depictions of the scene, but they appear smudgy by comparison.

This type of scene needs to take advantage of a phone’s processing power in order to iron out visibility issues, and I do find that the Edge appears to come up short here in this regard, with a lot of noticeable image noise.

Selfies

Each phone takes selfies with noticeable differences in style and color choices. For this test example, I’m in a well-lit daytime room with natural light from a window. The 12-megapixel front-facing camera on Google’s Pixel 10A brightened up my face as if there was a light in front of me, and captured a decent amount of the details of my hair and face.

The front-facing camera on Samsung’s Galaxy S25 FE shows a noticeably darker color tone, but it still captures a similar shade of orange on the wall behind me. Of the three photos, I felt like the S25 captures the most details, including strands of hair, and defaulted to a closer crop than the other two.

The photos taken by the 50-megapixel selfie camera on the Motorola Edge feel a bit smoothed out. The orange color on the wall is noticeably different from the Pixel and the S25 FE, though it does capture a lot of my face details, from hair strands to the fabric textures on my shirt.

The $499 Pixel 10A camera keeps up and, in some cases, exceeds the detail captured by the slightly more expensive $550 Motorola Edge and $650 Galaxy S25 FE. I’m quite impressed by how the Pixel camera handles colors and low-light environments, but the phone’s processing work sometimes makes scenes appear brighter than they are in real life.

The Galaxy S25 FE is no slouch either, with a third telephoto lens for capturing more detail farther away. While I did find the Motorola Edge to struggle in low light, it is one of the lowest-cost phone options currently available for someone who must have a 3x optical telephoto camera.

But if you can live without the telephoto lens, the Pixel 10A’s low cost and photography abilities will likely be a good fit for most people.

Google’s Pixel 10A Looks Stylish for a Low-Cost Flagship Phone

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Technologies

Today’s NYT Strands Hints, Answers and Help for March 14 #741

Here are hints and answers for the NYT Strands puzzle for March 14, No. 741.

Looking for the most recent Strands answer? Click here for our daily Strands hints, as well as our daily answers and hints for The New York Times Mini Crossword, Wordle, Connections and Connections: Sports Edition puzzles.

Does today’s date seem memorable to you? If so, today’s NYT Strands puzzle might be easy. Some of the answers are difficult to unscramble, so if you need hints and answers, read on.

I go into depth about the rules for Strands in this story.

If you’re looking for today’s Wordle, Connections and Mini Crossword answers, you can visit CNET’s NYT puzzle hints page.

Read more: NYT Connections Turns 1: These Are the 5 Toughest Puzzles So Far

Hint for today’s Strands puzzle

Today’s Strands theme is: A math teacher’s favorite dessert.

If that doesn’t help you, here’s a clue: 3.14

Clue words to unlock in-game hints

Your goal is to find hidden words that fit the puzzle’s theme. If you’re stuck, find any words you can. Every time you find three words of four letters or more, Strands will reveal one of the theme words. These are the words I used to get those hints but any words of four or more letters that you find will work:

RITE, SPIT, TIPS, STAT, STATE, GIVE, RUST, FINE, LAZE, SURE, PEAL

Answers for today’s Strands puzzle

These are the answers that tie into the theme. The goal of the puzzle is to find them all, including the spangram, a theme word that reaches from one side of the puzzle to the other. When you have all of them (I originally thought there were always eight but learned that the number can vary), every letter on the board will be used. Here are the nonspangram answers:

VENT, CRUST, FRUIT, EDGES, GLAZE, FILLING, LATTICE

Today’s Strands spangram

Today’s Strands spangram is HAPPYPIDAY. To find it, start with the H that’s six rows down and three to the right from the upper-left corner, and make — well, a pie shape.