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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.

Where is the third dog in this photo?

Optical illusions are wild. The way our brains perceive what our eyes see can be way off base, even when we're sure about what we're seeing.

Plenty of famous optical illusions have been created purposefully, from the Ames window that appears to be moving back and forth when it's actually rotating 360 degrees to the spiral image that makes Van Gogh's "Starry Night" look like it's moving.

But sometimes optical illusions happen by accident. Those ones are even more fun because we know they aren't a result of someone trying to trick our brains. Our brains do the tricking all by themselves.

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Democracy

This Map Reveals The True Value Of $100 In Each State

Your purchasing power can swing by 30% from state to state.

Image by Tax Foundation.

Map represents the value of 100 dollars.

As the cost of living in large cities continues to rise, more and more people are realizing that the value of a dollar in the United States is a very relative concept. For decades, cost of living indices have sought to address and benchmark the inconsistencies in what money will buy, but they are often so specific as to prevent a holistic picture or the ability to "browse" the data based on geographic location.

The Tax Foundation addressed many of these shortcomings using the most recent (2015) Bureau of Economic Analysis data to provide a familiar map of the United States overlaid with the relative value of what $100 is "worth" in each state. Granted, going state-by-state still introduces a fair amount of "smoothing" into the process — $100 will go farther in Los Angeles than in Fresno, for instance — but it does provide insight into where the value lies.

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A young woman drinking bottled water outdoors before exercising.



The Story of Bottled Waterwww.youtube.com

Here are six facts from the video above by The Story of Stuff Project that I'll definitely remember next time I'm tempted to buy bottled water.

1. Bottled water is more expensive than tap water (and not just a little).

via The Story of Stuff Project/YouTube


A Business Insider column noted that two-thirds of the bottled water sold in the United States is in individual 16.9-ounce bottles, which comes out to roughly $7.50 per gallon. That's about 2,000 times higher than the cost of a gallon of tap water.

And in an article in 20 Something Finance, G.E. Miller investigated the cost of bottled versus tap water for himself. He found that he could fill 4,787 20-ounce bottles with tap water for only $2.10! So if he paid $1 for a bottled water, he'd be paying 2,279 times the cost of tap.

2. Bottled water could potentially be of lower quality than tap water.

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Science

A 6-year-old asks ​Neil DeGrasse Tyson an adorable question. He gives her an awesome answer.

"The most beautiful thing we can experience is the mysterious. It is the source of all true art and science." — Albert Einstein

Neil DeGrasse Tyson at College of the Holy Cross in Worcester, MA.

I recently spent some time with Dr. Neil deGrasse Tyson. He's known not only for breaking down stereotypes about what kinds of people go into science, but he has actively stood up and spoken against those who would close its doors, especially to young women.

So when Neil was asked this question by a little girl during a public speech, he gave one of the best answers I've ever heard. It may drive some parents crazy, but it also might just help change the world.

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Photo courtesy of Kara Coley.


Kara Coley, a bartender at Sipps in Gulfport, Mississippi, got an unusual phone call on the job last week.

"Good evening," Coley answered. "Thank you for calling Sipps!"

A woman on the other end of the line asked, "Is this a gay bar?"

Sipps welcomes everyone, Coley explained to her, but indeed attracts a mostly LGBTQ crowd.



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An avocado tree farmer explains the science of Hass avocados

Have you ever seen anyone put an avocado pit in water to grow an avocado tree? I've seen lots of people try, but only a few succeed. My mom has a tiny avocado tree growing in her living room that she managed to grow from the pit of a Hass avocado she ate. It's small but thriving, and I've often wondered if it will ever grow actual avocados.

As it turns out, it could—but they won't be Hass avocados.

Wait, huh?

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