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xkcd's What If?

63 videos · 26 shorts · once a week

3:30

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What if you set off a nuke in the Mariana Trench?

2:05

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What if you floated upwards 1ft per second?

2:30

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What if all your DNA suddenly vanished?

1:10

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More weird and worrying questions

2:43

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If you put a toaster in a freezer, which wins?

2:04

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What if all visible light was a single beam?

3:04

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What if Earth’s Water Suddenly Disappeared?

2:10

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How long could you drive towards the sunset?

1:29

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What if the Moon were made of Protons?

0:48

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Weird and worrying questions

0:55

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What if half the human population ate the other half 🍽️

0:59

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How long could the human race survive on only cannibalism?

2:46

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What would a rainbow be like on Tatooine?

1:36

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What if you used a microwave as a snowblower?

1:16

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What if we turned the moon into a black hole?

2:55

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What if everything was antimatter EXCEPT Earth?

1:29

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What if you funneled the Niagara Falls through a straw?

1:12

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What if you had literally had all of the world's money?

2:53

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What if you dropped a bowling ball in the Mariana Trench?

1:24

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What would the world's largest cities be like if the land masses were rotated by 90 degrees?

1:55

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What would your country be like if the land masses were rotated by 90°?

3:00

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Could you power a house with the radioactivity from bananas?

1:46

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What would Earth's climate be like if the land masses were rotated by 90°?

1:02

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What would happen in Minnesota if the world rotated by 90 degrees?

0:46

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Why is the sky blue?

1:21

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What would happen if the Sun went dark?

2:53

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What if you kept digging downward?

1:26

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Which path would the three wise men have walked?

0:55

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Where would the three wise men go if they followed a planet?

2:53

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What if you floated upwards 1 ft every second?

1:08

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How many elevators would you need in a billion-story building?

1:49

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What if we built a billion-story building?

4:38

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What if you made a jetpack using rifles?

1:42

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What if you teleported to the Sun?

1:26

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What if you printed all of Wikipedia?

3:16

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How long would you survive with no DNA?

1:47

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What if we teleported the oceans to Mars?

1:50

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What if you drained the oceans?

2:48

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Can you power your computer by typing?

2:13

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What if everyone on Earth was in the same place and jumped at the same time?

1:37

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Could you swim in a spent nuclear fuel pool?

2:51

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What if ALL the sun’s power was focused in one place?

1:10

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Could you use a laser as an umbrella?

1:54

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What if you tried to hit a baseball pitched at 90% the speed of light?

2:46

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Can you drive west to lengthen the sunset?

1:06

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What would happen to the Earth if it suddenly stopped spinning?

1:16

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What would happen to the population if the Earth suddenly stopped spinning?

2:39

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Could we survive eating only humans?

1:12

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How detailed would the Hubbles images be if it looked at Earth?

0:45

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Could the Hubble take a photo of you?

2:48

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What if the Moon were made entirely of electrons?

1:33

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How fast could a vehicle go around a track - but the racer does not have to survive.

1:24

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How fast could a human accellerate (while staying alive)?

4:35

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What if you had a mole of moles?

0:45

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Petition to send a swimming pool to the moon!

0:21

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Circumference pop quiz!

0:26

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Could this be the last surviving human light source?

1:14

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Why Space Is Actually Warm!

0:49

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Could We Harvest Power From Lightning?

3:41

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What if the moon turned into a black hole?

1:07

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Is there such a thing as a magnitude 0 earthquake?

1:06

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How high could the magnitude of Earthquakes go?

3:37

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What if you funneled Niagara Falls through a straw?

2:53

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What if you used a flamethrower as a snowblower?

2:58

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What if you literally had all the money in the world?

3:12

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What if the sun suddenly went out?

6:47

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What if the Earth rotated 90 degrees?

2:46

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What if the wise men kept walking after Jesus’s birth?

3:56

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What if you built a billion-story building?

2:53

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What if we put a pool on the moon?

4:02

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But what if we tried MORE power?

5:37

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What if everyone pointed a laser at the moon?

5:16

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What if Earth grew 1cm every second?

4:20

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What if a glass of water were LITERALLY half empty?

3:29

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Could you survive a nanosecond on the Sun?

4:28

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What if we teleported the oceans to Mars?

2:57

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What if you tried to print Wikipedia?

3:30

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What if you drained the oceans?

5:04

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If all humans died, when would the last light go out?

3:47

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What if all the lightning on Earth struck the same place at once?

3:52

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What if everyone jumped at once?

3:58

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What if you swam in a nuclear storage pool?

4:23

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Would a Submarine Work as a Spaceship?

3:06

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Could you make an umbrella out of lasers?

3:15

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What if you threw a baseball at nearly light speed?

4:35

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What if Earth suddenly stopped spinning?

4:30

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What if NASCAR had no rules?

3:06

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What would a magnitude 15 earthquake be like?

3:28

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What if we aimed the Hubble Telescope at Earth?