Technologies

Go Ahead and Let Out a Deep Sigh Right Now. It’s Actually Good for You

A new study dives into how deep breaths help our lungs.

After breathing a deep sigh, I feel better — don’t you? It’s relaxing. And it turns out there’s a good reason why we feel relief after big breaths. It comes down to a special fluid inside our lungs. The liquid — pulmonary surfactant — helps our lungs work. Without it, we’d be in serious trouble. But researchers at ETH Zurich, a university in Switzerland, found that deep breaths have an interesting effect on how this fluid interacts with the lungs. The new research was published in the journal Science Advances and could have meaningful implications for future medicine and therapies.

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‘Magic’ lung fluid to the rescue

For a long time, scientists have been interested in how this fluid helps us breathe. In the 1980s, research into this area resulted in a life-saving treatment for babies born prematurely with underdeveloped lungs.

By extracting fluid from animal lungs and injecting it into those of premature infants, doctors were able to reduce respiratory distress syndrome from developing right after birth. The fluid reduces surface stress in the lungs.

«This surface stress influences how compliant the lungs are,» said ETH Zurich professor Jan Vermant. «The more compliant the lungs are, the less resistance there is to expansion and contraction — and the easier it is to breathe.»

Breathing deep to ease tension

The research team wanted to see how lung fluid behaved when it was stretched and recompressed, so they simulated the movements of normal and deep breaths in the lab.

They measured the fluid’s surface stress in each case and compared the data. The researchers found that surface stress decreases significantly after a deep breath.

The utmost layer of the thin film that the fluid leaves on a lung settles and hardens over time.

«Directly at the boundary with the air, there is a slightly stiffer surface layer,» said Maria Novaes-Silva, a doctoral student in Vermant’s research group and the study’s first author. She said that the pronounced stretching and compression of the pulmonary fluid that comes with a deep sigh actually rearranges the surface layer’s composition.

So, after you let out a deep breath, it becomes easier for you to breathe. That’s why we feel a sense of relief from a deep sigh.

An ETH Zurich spokesperson said that clinical practice has also found that breathing becomes increasingly complex with constant shallow breaths. So, the lab measurements seem to follow real-world observations.

The researchers theorize that this study may contribute to a better understanding of adult lung failure.

Technologies

Today’s NYT Strands Hints, Answers and Help for Dec. 5 #642

Here are hints and answers for the NYT Strands puzzle for Dec. 5, No. 642.

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.

Today’s NYT Strands puzzle is a fun one, and the theme is interesting. 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: Feeling peckish?

If that doesn’t help you, here’s a clue: Can I see a menu?

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:

BAKE, BAKER, BONE, BONES, SIRS, FUNS, FACT, BUTT, DIET, DIETS, GREW, STEW, GOUT, DINE, NEST, NETS, TEAK

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:

BAKERY, CAFE, BISTRO, BUFFET, BREWERY, STEAKHOUSE

Today’s Strands spangram

Today’s Strands spangram is DININGOUT. To find it, start with the D that is three letters to the right on the top row, and wind down.

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Technologies

Today’s NYT Mini Crossword Answers for Friday, Dec. 5

Here are the answers for The New York Times Mini Crossword for Dec. 5.

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

Need some help with today’s Mini Crossword? Three of the clues involve a now-infamous Gen Z/Gen Alpha joke, so you might want to have a young person nearby. Read on. And if you could use some hints and guidance for daily solving, check out our Mini Crossword tips.

If you’re looking for today’s Wordle, Connections, Connections: Sports Edition and Strands answers, you can visit CNET’s NYT puzzle hints page.

Read more: Tips and Tricks for Solving The New York Times Mini Crossword

Let’s get to those Mini Crossword clues and answers.

Mini across clues and answers

1A clue: Beaver’s building project
Answer: DAM

4A clue: Unit of distance originally equivalent to 1,000 paces
Answer: MILE

5A clue: Number of dwarfs or deadly sins
Answer: SEVEN

6A clue: Extra-large film format
Answer: IMAX

7A clue: Crosses (out)
Answer: XES

Mini down clues and answers

1D clue: Difficult-to-work-with stars
Answer: DIVAS

2D clue: U.S. soccer star ___ Morgan
Answer: ALEX

3D clue: Roughly half of the adult population
Answer: MEN

4D clue: 5-Down-5-Across, for one
Answer: MEME

5D clue: Broadway musical about the wives of Henry VIII
Answer: SIX

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Technologies

The Mystery of the iPhone 17 Pro’s Missing Night Mode for Portraits

Is it a bug? Is it a technical issue? Or did Apple just yank a camera feature that wasn’t popular?

It’s a mystery. Night mode isn’t available in Portrait Mode on the iPhone 17 Pro, and no one seems to know why. Yet.

Night mode automatically brightens photos and captures more details, even in low-light conditions. You can adjust the exposure time manually. In Portrait mode, the camera focuses sharply on the subject you’re snapping and blurs the background, creating a depth-of-field effect.

The first clue that Night mode for Portrait mode was gone came from an Apple support document titled Take Night mode photos with your iPhone camera. It states what many iPhone aficionados already know: «Night mode automatically brightens photos and captures more detail in low light.»

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Night mode for the iPhone 17 Pro is listed in two separate parts of the iPhone online user guide (here and also here) for selfies and time-lapse photos. But it isn’t included on the guide’s list for snapping Night mode photos in Portrait mode. The feature is still available on iPhone Pro and Pro Max on the 12, 13, 14, 15 and 16 series.

Upon investigation, CNET staffers verified that, indeed, Night mode is no longer an option in Portrait mode with the iPhone 17 Pro.

An Apple representative didn’t immediately respond to a request for comment.

When the iPhone 17 Pro was launched in September, Andrew Lanxon, CNET’s lead photographer in Europe, was impressed by the camera upgrades over the iPhone 16 Pro, including optical zoom that doubled to 8x, a telephoto camera sensor 56% larger than before and 48 megapixels of resolution.

Lanxon, a professional photographer and YouTuber, was excited to get shooting with the iPhone 17 Pro. But apparently, he will have to do without Night mode in Portrait mode.

Why did Apple do it?

Why was Night mode removed? «There doesn’t appear to be a hardware reason for it,» said CNET senior writer Jeff Carlson. «The Lidar camera that helps with low-light focusing and depth perception is still there. Perhaps it’s a software issue, but as of the iOS 26.2 release candidate, the feature isn’t present.»

Carlson found it curious that it’s taken three months since the launch of the new pro model before people noticed that it’s missing. He speculates that the feature was possibly removed because it «wasn’t being used and Apple could devote other processing resources elsewhere,» he said. «Perhaps something broke in the development of the new operating system and revamped Camera app, and it hasn’t been a high enough priority to fix in the regular release schedule.

«People have gotten used to having iPhone models that enable shots that are otherwise difficult for smartphone cameras, especially on a flagship like the iPhone 17 Pro,» Carlson said. «I hope the feature returns to give everyone the most control over the photos they capture.»

One parallel might be what Samsung did earlier this year — removing S Pen Bluetooth connectivity on the new S25 Ultra. Samsung said they removed the feature because not many people were using it. Is Apple doing the same thing with Night mode for portraits?

Some people miss it, some don’t

A subreddit on the topic appeared to be a mix of «who cares» and «oh darn.» Redditor kaoss_pad was «low key happy» that the feature had vanished, saying that «it would often surprise me and activate when I didn’t want it and ruin a moment.»

Some Redditors weren’t even aware of the feature. CultofCedar posted, «lol didn’t even notice that wasn’t a thing,» and Successful-Cover5433 wrote, «I didn’t even know you could.»

A couple of folks weren’t happy about the mysterious disappearance, including nsfdrag, who posted, «Kind of a bummer, I like the feature.»