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Science

MIT’s trillion-frames-per-second camera can capture light as it travels

"There's nothing in the universe that looks fast to this camera."

Photo from YouTube video.

Photographing the path of light.

A new camera developed at MIT can photograph a trillion frames per second.

Compare that with a traditional movie camera which takes a mere 24. This new advancement in photographic technology has given scientists the ability to photograph the movement of the fastest thing in the Universe, light.


The actual event occurred in a nano second, but the camera has the ability to slow it down to twenty seconds.

time, science, frames per second, bounced light

The amazing camera.

Photo from YouTube video.

For some perspective, according to New York Times writer, John Markoff, "If a bullet were tracked in the same fashion moving through the same fluid, the resulting movie would last three years."


In the video below, you'll see experimental footage of light photons traveling 600-million-miles-per-hour through water.

It's impossible to directly record light so the camera takes millions of scans to recreate each image. The process has been called femto-photography and according to Andrea Velten, a researcher involved with the project, "There's nothing in the universe that looks fast to this camera."

(H/T Curiosity)


This article originally appeared on 09.08.17

Health

Why time seems to accelerate as we get older and what we can do to slow it down

How time works is totally trippy, but there are some "tricks" to change how our brains process it.

Jordan Benton/Canva

Time is weird.

You're going along, minding your own business on the internet, when suddenly this little gem comes across your timeline:

screenshot that reads "1980 and 2023 are as far apart as 1937 and 1980 were. Sleep tight, odl fogies"1980 to 2023 = 1937 to 1980. How can that math be right? Kevin Smith/GenX Only Facebook Group

Your first reaction is, "Nuh-uh, no way," so you pull out the calculator to do the math yourself—several times because you're sure you must've missed a number somewhere. You remember how long ago 1937 seemed in 1980, and there's no possible way that much time has passed between 1980 and now. Then, as the warped reality of time washes over you, you sit and stare in stunned silence, contemplating the existential crisis.

Why does time work this way? Why does it seem to get faster and faster and condense to make decades seem shorter and shorter as we age? And perhaps more importantly, how the heck do we stop time from feeling like a runaway freight train?


Here are a few theories about what creates the freight train phenomenon.

Time perception is relative—and kids perceive it differently

"Time flies when you're having fun" is a saying for a reason. Time also drags when you're doing drudgery work and feels like it stands still in moments of significance. And yet the ticking of seconds as they go by doesn't change tempo. We measure it with steady, unchanging beats, but how it feels changes constantly.

This relativity exists in every passing moment, but it also exists in the bigger picture as well. The years felt like they passed by much more slowly when we were children, and by middle age, they feel like they pass in the blink of an eye. The pandemic gave us an even greater sense of this relativity as disruptions to our normal routines and the stress associated with the COVID-19 years messed with our sense of time. (On an odd side note, surveys show that our time perception during the pandemic varied a lot from place to place—people in some parts of the world felt that time moved more slowly, while others felt time moved more quickly.)

According to a 2023 Hungarian study published in Nature Scientific Reports, very young children perceive time differently than older children and adults. Researchers split 138 people into three age groups—pre-kindergarten, school-age and adults 18 and over—and showed them two videos of the same duration, one that was "eventful" and one that was "uneventful." Interestingly, the pre-K group perceived the eventful video to be longer, while the older children and adults saw the uneventful video as longer.

The way the study participants described the length of the videos in gestures was also telling. Young children were much more likely to use vertical hand gestures, connoting volume or magnitude, to indicate a length of time than the other two age groups. School-aged kids and adults tended to use horizontal gestures, indicating time as linear, increasing with age.

Our neural processing slows down as we age

Professor Adrian Bejan has a theory based on how neurons process signals. As we age, our neural networks increase in size and complexity, and as a result, process visual information at a slower rate. That slower processing means we create fewer mental images each second than we did when we were younger, thereby making time seem to slow down.

“People are often amazed at how much they remember from days that seemed to last forever in their youth, Bejan shared with Harvard University. "It’s not that their experiences were much deeper or more meaningful; it’s just that they were being processed in rapid fire.”

In other words, processing the same number of mental images we did in our youth takes longer now, somewhat counterintuitively making time seem to pass more quickly. So goes the theory, anyway.

It might simply be about time-to-life ratios

Another popular theory about why time feels different as a child than it does as an adult is the ratio of any given day, week or year to the amount of time we've been alive. To a 5-year-old, a year is 20% of their entire life. For a 50-year-old, a year only is 0.2% of their life, so it feels like it went by much more quickly.

It's also a matter of how much change has happened in that year. A year in the life of a 5-year-old is full of rapid growth and change and learning and development. A year in the life of a 50-year-old probably isn't a whole lot different than when they were 48 or 49. Even if there are major life changes, the middle-aged brain isn't evolving at nearly the same rate as a child. A 50-year-old looking back at the past year will have a lot fewer changes to process than a 5-year-old, therefore the year will seems like it went by a lot faster.

“Our perception of days, weeks, years and that kind of time seems to be especially influenced by our perspective: Are we in the moment experiencing it, or are we looking backward on time?” psychology professor Cindy Lustig told the University of Michigan.

The key to slowing it all down? Be mindful of the present moment.

Lustig has a point. When we are in the moment, our perception of time is much different than when we look back. So, being fully conscious in the present moment can help us rein in the freight train effect.

One way to do that is to be mindful of your physical existence in this moment. Feel your heart beating. Feel your breath going in and out. Cornell University psychology professor Adam Anderson, Ph.D., conducted a study that found our perception of time may be linked with the length of our heartbeats. (Study participants were fitted with electrocardiograms and asked to listen to a brief audio tone. They perceived the tone as longer after a longer heartbeat and shorter after a shorter one.) He suggests starting a stopwatch, closing your eyes and focusing on your breathing for what you think feels like a minute. Then, check your time to see how accurate your estimation was.

“This can give you a sense of how much your experience of your body is related to your experience of time,” Anderson told WebMD. “It will help teach you to enjoy the pure experience of time.”

You can also use focused breathing to purposely slow down your heart rate, and thus slow down your time perception. “We show that slow heart rates—that is, a longer duration between heartbeats—dilates time, slowing it down," Anderson said.

Finally, try to take in the world the way you did as a small child. Take note of life's wonders. Engage fully in whatever you're doing. Notice details and take mental pictures as much as you can. Time goes by fast when we're distracted, so training our attention on the here and now can help. Ultimately, we can strive to perceive time more like we did when we were little, in its full depth and magnitude instead of a narrow, straight line.

Joy

Comedian's song about life in the 90s has Gen X giggling with nostalgia

Ah, the good old days, when you had to choose between the phone or the internet.

Sammy J took us on a trip down memory lane.

Those of us who remember life before the internet love nothing more than to share "back in my day" stories with today's youngsters who've never had to try to get somewhere without GPS. When we tell our kids about dial-up internet, they look at us the same bewildered way we looked at our parents when they talked about party lines. So much fun.

Nothing splits the generations like what was considered advanced technology during our formative years, and one comedian has encapsulated that divide in an ode to the 1990s.

Sammy J sang "You'll Never Know What It's Like" at the Melbourne International Comedy Festival and had the audience giggling along with recollections of life in the 90s. Driving around in the car with a big book of maps? Check. Making a collect call to tell your mom to pick you up but avoiding the collect call charges by telling her where you were instead of saying your name? Check. Agonizing over whether to take a photo because you only have 24 shots in your disposable camera? Check.

Younger generations will never know what it was like to live so primitively, it's true. But Gen X does, and this song is like taking a cold plunge into a pool of nostalgia.

Enjoy:

People loved the musical trip to the past.

"Thank you for taking me down memory lane! It was a blast 😀" wrote one commenter.

But some couldn't agree on whether young people have it better today or had it better in the 90s.

"All true! If only our teenagers knew who good they have it!" wrote one person.

"Life was so so good in the 90’s I feel lucky it didn’t have to grow up in this era 😕," shared another.

"God I miss the 90s!" wrote another. "Both my daughters always say they wish they grew up in the 90s bc it seemed so much fun and it was!!"

Kids today really will never know what those days were like, but that's okay. They'll be singing their own "back in my day" songs someday and marvel at how much has changed since they were young.

Jordan Wilson started taking a daily selfie when he was 13.

On Christmas Day in 2007, when he was just 13-years-old, Jordan Wilson hung up a purple sheet of fabric and took a photo of himself in front of it with his digital camera.

He's done the exact same thing every day since.

When he goes on vacation, he takes the purple curtain with him so he doesn't miss a day. He used the same digital camera from 2007 to 2020, when light flares started showing at the bottom of his photos indicating that the camera was on its last legs. He tracked down the exact same model of camera from 2007 to replace it and kept going.


Now he has a timelapse of his face every day of his life for 15 years, with the same backdrop from the same distance and angle, and watching it play out is truly fascinating.

Most of us find it interesting to see photos of ourselves from when we were younger and notice how we've changed, but imagine what it would be like to watch yourself grow and change daily through your entire adolescence and early adulthood.

The foresight it would take to do that at age 13 is remarkable, as is the dedication to taking a daily selfie no matter what. Wilson shared his timelapse video on YouTube this week and has been responding to people's questions about his process on Reddit.

Watch him go from a chubby-cheeked young teen to a balding, bearded young man in less than five minutes:

Wilson shared that he used the free video editing software DaVinci Resolve to create the video. "It has a timelapse stabilisation option built into it, and that's what it's in the video," he wrote.

He also shared that there are actually two different curtains in the video because he made a second backdrop when he started splitting his time between two different cities about 10 years into the project so he wouldn't have to always transport the one back and forth.

It's pretty brave to put something like this out on the internet, where you know people will comment on everything from your hair to your weight to your teen acne. But it's also a mesmerizing creation that allows us to see time passing in a way we don't normally get to. One can't help but wonder what he was personally experiencing through all of these daily photos—the ups and downs of the teen years, educational endeavors and jobs, relationships and family dynamics. And then to think about what was happening in the world during this time—the financial crisis of 2008, the Obama years, the political upheaval that followed, the COVID-19 pandemic and more. (If you watch carefully, there's even a little blip of a mask toward the end of the video).

Wilson has been sharing his timelapse videos every five years, and he wrote that he has no plans to stop now. So look for another of these videos to come around Christmas of 2027 to see how he changes as he heads into his 30s. Will he lose more hair? Start seeing some early grays and wrinkles? Time will tell, and thanks to a 13-year-old looking ahead in 2007, there's a good chance we'll get to see what it says in another five years.

Thanks for the cool trip through time, Jordan Wilson!