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2,515 results
How quickly would the oceans drain if a circular portal 20 meters in diameter appeared at the bottom of Challenger Deep, the ...
908,861 views
5 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 ...
2,810,472 views
3 weeks ago
The #1 New York Times bestselling author of What If? and How To answers more of the weirdest questions you never thought to ...
1,372,553 views
1 year 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?
1,126,302 views
2 months ago
REFERENCES Page with TONS of info about water and ice https://water.lsbu.ac.uk/water/water_density.html Specifically, a graph ...
1,923,676 views
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 ...
943,377 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 ...
1,384,880 views
4 months ago
The world's most entertaining and useless self-help guide, from the brilliant mind behind the wildly popular webcomic xkcd and ...
1,596,088 views
4 years 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?
1,028,030 views
1 month ago
What would happen if the Earth and all terrestrial objects suddenly stopped spinning, but the atmosphere retained its velocity?
1,208,994 views
5 months ago
Henry Reich is the creator of MinutePhysics and executive producer of MinuteEarth and MinuteFood and founder of Neptune ...
2,189,180 views
3 months ago
Thanks to Randall Munroe (of XKCD, What If?, and Thing Explainer) and Houghton Mifflin Harcourt for making this video possible!
1,258,119 views
8 years 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 ...
968,795 views
Since we usually hear about earthquakes with ratings somewhere between 3 and 9, a lot of people probably think of 10 as the top ...
2,663,226 views
6 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 ...
1,724,517 views
Web cartoonist Randall Munroe answers simple what-if questions ("what if you hit a baseball moving at the speed of light?") using ...
1,048,421 views
10 years ago
xkcd on the best (and worst) ways to power your house with renewable energy. Our video features just a few of the many “useless ...
330,341 views
This video is about how efficient various reactions are at converting mass to energy (as we know from the Einstein mass-energy ...
4,126,120 views
6 years ago
This video is about the international system of units (SI), the international prototype kilogram (the IPK or "le grande k"), and ...
721,984 views
This video is about what happens if you try to pass a portal (like in the video game Portal or Portal 2) through itself - do you get a ...
10,315,144 views