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Science

Two guys captured the speed of light on camera at 10 trillion frames per second

"The light is moving a million times faster than a bullet.”

speed of light, slow mo guys
The Slow Mo Guys/Youtube

The Slow Mo Guys had to use a special camera

Gavin Free and Daniel Gruchy aka the “Slow Mo guys,” have filmed all sorts of things in, you guessed it, slow motion—everything from popcorn makers to giant water balloons to even tattoo guns. Each of their videos feels a bit like “Mythbusters.” Just a couple of guys making science super fun.

One of the Slow Mo Guys’ most popular videos, with a total of 41 million views on Youtube to date, features the fastest thing known to man: light.

Since light travels at an unfathomable 186,000 miles per second, Free and Gruchy had to reach out to CalTech for a camera that could capture “10 trillion frames per second,” which they said was “20 million times faster than the fastest we've ever filmed on this channel."

The team first shoots a beam of light through a bottle of milk water. Even though to the naked eye, it looks as though the bottle instantly lit up, the later footage reveals the light (a sort of blue ghost-like thing in the playback) travels from one side of the bottle to the other.

“Every frame seems to be ten picoseconds,” Free says. “And we're just sort of casually watching this go left to right through the bottle, but in reality the light is moving a million times faster than a bullet.”

Watch the full video below, which includes a few other fascinating slow motion experiments with light.

What is the fastest thing we as the human race know of? Gav and Dan try and film that.

Identity

Celebrate International Women's Day with these stunning photos of female leaders changing the world

The portraits, taken by acclaimed photographer Nigel Barker, are part of CARE's "She Leads the World" campaign.

Images provided by CARE

Kadiatu (left), Zainab (right)

True

Women are breaking down barriers every day. They are transforming the world into a more equitable place with every scientific discovery, athletic feat, social justice reform, artistic endeavor, leadership role, and community outreach project.

And while these breakthroughs are happening all the time, International Women’s Day (Mar 8) is when we can all take time to acknowledge the collective progress, and celebrate how “She Leads the World.

This year, CARE, a leading global humanitarian organization dedicated to empowering women and girls, is celebrating International Women’s Day through the power of portraiture. CARE partnered with high-profile photographer Nigel Barker, best known for his work on “America’s Next Top Model,” to capture breathtaking images of seven remarkable women who have prevailed over countless obstacles to become leaders within their communities.

“Mabinty, Isatu, Adama, and Kadiatu represent so many women around the world overcoming incredible obstacles to lead their communities,” said Michelle Nunn, President and CEO of CARE USA.

Barker’s bold portraits, as part of CARE’s “She Leads The World” campaign, not only elevate each woman’s story, but also shine a spotlight on how CARE programs helped them get to where they are today.

About the women:

Mabinty

international womens day, care.org

Mabinty is a businesswoman and a member of a CARE savings circle along with a group of other women. She buys and sells groundnuts, rice, and fuel. She and her husband have created such a successful enterprise that Mabinty volunteers her time as a teacher in the local school. She was the first woman to teach there, prompting a second woman to do so. Her fellow teachers and students look up to Mabinty as the leader and educator she is.

Kadiatu

international womens day, care.org

Kadiatu supports herself through a small business selling food. She also volunteers at a health clinic in the neighboring village where she is a nursing student. She tests for malaria, works with infants, and joins her fellow staff in dancing and singing with the women who visit the clinic. She aspires to become a full-time nurse so she can treat and cure people. Today, she leads by example and with ambition.

Isatu

international womens day, care.org

When Isatu was three months pregnant, her husband left her, seeking his fortune in the gold mines. Now Isatu makes her own way, buying and selling food to support her four children. It is a struggle, but Isatu is determined to be a part of her community and a provider for her kids. A single mother of four is nothing if not a leader.

Zainab

international womens day, care.org

Zainab is the Nurse in Charge at the Maternal Child Health Outpost in her community. She is the only nurse in the surrounding area, and so she is responsible for the pre-natal health of the community’s mothers-to-be and for the safe delivery of their babies. In a country with one of the world’s worst maternal death rates, Zainab has not lost a single mother. The community rallies around Zainab and the work she does. She describes the women who visit the clinic as sisters. That feeling is clearly mutual.

Adama

international womens day, care.org

Adama is something few women are - a kehkeh driver. A kehkeh is a three-wheeled motorcycle taxi, known elsewhere as a tuktuk. Working in the Kissy neighborhood of Freetown, Adama is the primary breadwinner for her family, including her son. She keeps her riders safe in other ways, too, by selling condoms. With HIV threatening to increase its spread, this is a vital service to the community.

Ya Yaebo

international womens day, care.org

“Ya” is a term of respect for older, accomplished women. Ya Yaebo has earned that title as head of her local farmers group. But there is much more than that. She started as a Village Savings and Loan Association member and began putting money into her business. There is the groundnut farm, her team buys and sells rice, and own their own oil processing machine. They even supply seeds to the Ministry of Agriculture. She has used her success to the benefit of people in need in her community and is a vocal advocate for educating girls, not having gone beyond grade seven herself.

On Monday, March 4, CARE will host an exhibition of photography in New York City featuring these portraits, kicking off the multi-day “She Leads the World Campaign.

Learn more, view the portraits, and join CARE’s International Women's Day "She Leads the World" celebration at CARE.org/sheleads.


Health

Over or under? Surprisingly, there actually is a 'correct' way to hang a toilet paper roll.

Let's settle this silly-but-surprisingly-heated debate once and for all.

Elya/Wikimedia Commons

Should you hang the toilet paper roll over or under?



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Humans have debated things large and small over the millennia, from the democracy to breastfeeding in public to how often people ought to wash their sheets.

But perhaps the most silly-yet-surprisingly-heated household debate is the one in which we argue over which way to hang the toilet paper roll.

The "over or under" question has plagued marriages and casual acquaintances alike for over 100 years, with both sides convinced they have the soundest reasoning for putting their toilet paper loose end out or loose end under. Some people feel so strongly about right vs. wrong TP hanging that they will even flip the roll over when they go to the bathroom in the homes of strangers.

Contrary to popular belief, it's not merely an inconsequential preference. There is actually a "correct" way to hang toilet paper, according to health experts as well as the man who invented the toilet paper roll in the first place.

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Brielle Asero lost her job after 2 months.

TikTokker Brielle Asero, 21, a recent college graduate, went viral on TikTok in October for her emotional reaction to the first day at a 9-to-5 job. The video, which received 3.4 million views, captured the public’s attention because it was like a cultural Rorschach test.

Some who saw the video thought that Asero came off as entitled and exemplified the younger generation’s lack of work ethic. In contrast, others sympathized with the young woman who is just beginning to understand how hard it is to find work-life balance in modern-day America.

“I’m so upset,” she says in the video. "I get on the train at 7:30 a.m., and I don't get home until 6:15 p.m. [at the] earliest. I don't have time to do anything!" Asero said in a video.

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Some girls out at a bchelorette party.

A recent story posted on Reddit shows how sometimes trusting your gut can be the best thing you can do, even if following it will seriously impact your friendships. It all started when a 24-year-old woman with the username Yslbabycat went to a bachelorette party with 5 other friends in Italy.

For brevity’s sake, we’ll call our main character YBC.

One night, the six girls went bar and club hopping and met some new friends. “We met some young people, and they invited us to a party. We went and danced and met more people. The night kept going on longer, and we were very far from our lodgings. These young men with 2 women in their group told us to stay with them for the night,” she wrote.

That’s when she had the first strong gut feeling.

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Family

Single dad receives letter from late wife and immediately gets a DNA test

"She wrote a letter for me before she died, but I couldn’t bring myself to read it until now."

A devastated man sitting by the ocean.

Ten months after a man’s wife passed away, he finally got the courage to read a letter she left him, which contained a devastating admission. The 4-year-old son they had together may not be his.

“My ‘darling’ wife passed away 10 months ago,” the man wrote on Reddit’s Off My Chest forum. “She wrote a letter for me before she died, but I couldn’t bring myself to read it until now. She told me how sorry she was that she didn’t have the guts to tell me this to my face when she was alive.”

In the letter, the wife revealed that there was a “good chance” that the son he thought was his wasn’t his biological child. A few weeks before their wedding day, the wife got drunk at her bachelorette party and had a one-night stand with another man. Soon after that night, she became pregnant but was unsure who the father was.

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Cage for reviving canary, with oxygen cylinder, made by Siebe Gorman & Co. Ltd, London.

These days the phrase "canary in the coal mine" is used to refer to any early warning sign of trouble or danger, but it's based in the real history of canaries being used in coal mining. Miners would carry the songbirds into the mine with them as a makeshift carbon monoxide alarm, as the bird's small body would be impacted by the odorless gas first, giving miners time to evacuate before it built to deadly levels.

Many if not most of us probably assume the canaries used for this purpose gave up their lives to save the coal miners. As it turns out, that was not always the case.

In fact, the man who created the canary in the coal mine system went out of his way to make sure the birds could do their job safely.

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A man cries out in rage while working on his laptop.

There’s a strange thing happening in the U.S. economy these days. Unemployment has been at its lowest in decades, and layoffs remain modest. However, people who are looking for work are having a hard time getting hired and it’s frustrating to send resume after resume and never hear anything back. What gives?

Business Insider says that despite a strong economy, employers are cautious about hiring more employees until they’re sure inflation is under control and that the Federal Reserve will eventually lower interest rates.

"It feels like the job market is in a bit of a holding pattern," Daniel Zhao, a lead economist at Glassdoor, recently told Business Insider.

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