Upload date
All time
Last hour
Today
This week
This month
This year
Type
All
Video
Channel
Playlist
Movie
Duration
Short (< 4 minutes)
Medium (4-20 minutes)
Long (> 20 minutes)
Sort by
Relevance
Rating
View count
Features
HD
Subtitles/CC
Creative Commons
3D
Live
4K
360°
VR180
HDR
424 results
How quickly would the oceans drain if a circular portal 20 meters in diameter appeared at the bottom of Challenger Deep, the ...
815,777 views
2 days ago
If every human somehow simply disappeared from the face of the earth, how long would it be before the last artificial light source ...
2,748,813 views
3 weeks ago
What would happen if everyone on earth stood as close to each other as they could, jumped, and landed on the ground all at the ...
930,852 views
2 months ago
Henry Reich is the creator of MinutePhysics and executive producer of MinuteEarth and MinuteFood and founder of Neptune ...
2,175,297 views
3 months ago
What if I took a swim in a typical spent nuclear fuel pool? Would I need to dive to actually experience a fatal amount of radiation?
1,116,574 views
What would happen if you tried to hit a baseball pitched at 90% the speed of light? Randall Munroe is the author of the New York ...
1,375,674 views
4 months ago
If all the lightning that occurs worldwide on any given day all struck the same place at once, what would happen to that place?
1,010,723 views
1 month ago
Since we usually hear about earthquakes with ratings somewhere between 3 and 9, a lot of people probably think of 10 as the top ...
2,650,728 views
6 months ago
Stopping rain from falling on something with an umbrella is boring. What if you tried to stop rain with a laser that targeted and ...
961,998 views
What would happen if the Earth and all terrestrial objects suddenly stopped spinning, but the atmosphere retained its velocity?
1,200,450 views
5 months ago
If you pointed the Hubble telescope at the Earth, what could you see? Could you read over your neighbor's shoulder? Or would it ...
1,714,600 views
Solar eclipses don't just happen here on earth - moons of other planets also pass between those planets and the sun, resulting in ...
544,047 views
The first video we created together with our friends at xkcd is out now! You can find it here: http://youtube.com/@xkcd_whatif.
103,898 views
Titan. The most majestic of Saturn's many moons. And the most promising for life too. It's got a beautiful view and liquid lakes on its ...
2,375,985 views
9 months ago
Don't use Okta. Wait, you want to know more? How about the utter mishandling of user information and complete disregard for ...
3,148 views
If you're in a boat and you drop a heavy ball into the water; will the water level go up, go down, or stay the same. Solving this ...
244,050 views
The moon orbits the earth once per month, which means the moon is on the sun side of the earth every month. So... "why aren't ...
476,041 views
Learn about mathematical induction, the difference between mutual and common knowledge, and the blue-eyed islanders puzzle ...
7,714 views
nx.
410 views
original #xkcd comic by Randall Munroe: https://xkcd.com/941/ music: "Fatality" by Maomann (Tigoolio), Licensed under Creative ...
16 views