User Gary Walker

108 votes

What could people notice about someone who is two times as dense as a regular person?

answered Jun 9, 2018 at 21:06

91 votes

Accepted

What could prevent a sentient species from going to space?

answered Jun 21, 2016 at 10:22

76 votes

How would Facebook Sysadmins prevent the summoning of Cthulhu?

answered Dec 16, 2015 at 1:43

61 votes

Accepted

Everything Joe says is true. How can he most help humanity?

answered Dec 21, 2015 at 10:49

54 votes

Everyone believes everything Joe says. How can he get around it?

answered Dec 12, 2015 at 20:52

54 votes

Accepted

A person from medieval times comes into our time. What would he notice first?

answered Sep 12, 2015 at 22:22

51 votes

Alice has been shrunk! Will she notice?

answered Mar 19, 2020 at 21:48

49 votes

How could a planet have one hemisphere way warmer than the other without the planet being tidally locked?

answered Sep 3, 2019 at 21:14

39 votes

Accepted

What would be the consequences for Earth if the moon disappeared?

answered Apr 20, 2015 at 6:31

31 votes

Is it possible for a planet’s climate to block, or at least make wireless communication irrelevant?

answered Jan 23, 2019 at 20:51

27 votes

What if there was no coffee anymore?

answered Dec 27, 2015 at 18:13

26 votes

Is a "long exposure"-like night sky possible?

answered Nov 7, 2017 at 22:36

26 votes

How can Elsa's power fuel my Industrial Revolution?

answered Oct 9, 2017 at 19:52

24 votes

How to wrap the Moon in plastic to make her a giant, supported by the atmospheric pressure, greenhouse

answered Apr 6, 2016 at 14:00

23 votes

Is there enough fresh water in the world to eradicate the drinking water crisis?

answered Mar 25, 2019 at 11:38

23 votes

What could a self-sustaining lunar colony slowly lose that would ultimately prove fatal?

answered May 21, 2019 at 21:11

22 votes

How could a submarine-like vehicle steer and propel itself in a superfluid?

answered Feb 10, 2017 at 0:24

19 votes

How might nuclear power have never been developed?

answered Dec 14, 2021 at 1:38

19 votes

Accepted

How feasible is a nuclear powered air liner?

answered Sep 25, 2015 at 12:34

19 votes

Would Artificial Gravity With Short Range Be Possible?

answered Nov 10 at 3:37

18 votes

Accepted

What services could a time traveller offer a medieval king?

answered Dec 9, 2015 at 1:10

18 votes

What elements would be created in a star composed entirely of gold?

answered Oct 16, 2019 at 21:30

17 votes

Accepted

Elevator through the earth? Yay or Nay

answered Nov 25, 2015 at 5:19

16 votes

Accepted

If Earth and the Moon's Relationship Were a Bit Closer

answered Sep 15, 2015 at 3:11

16 votes

How plausible is it for nuclear power to be invented but not nuclear weapons?

answered Sep 21, 2020 at 21:04

16 votes

How big of an explosion can you make with a fusion reactor?

answered Feb 4 at 18:35

15 votes

Accepted

How safe it would be to look at the other planet in double-planet system with naked eye?

answered Feb 26 at 1:18

15 votes

Could an astronaut in a near-future space ship survive transit through our asteroid belt?

answered Sep 1, 2018 at 23:37

15 votes

How many humans can I abduct without getting noticed?

answered Nov 12, 2015 at 18:47

15 votes

Accepted

How can someone be invulnerable to any damage down to cellular levels while still having a limited lifespan?

answered Jul 1, 2016 at 12:31

Stack Exchange Network

293 Answers

What could people notice about someone who is two times as dense as a regular person?

What could prevent a sentient species from going to space?

How would Facebook Sysadmins prevent the summoning of Cthulhu?

Everything Joe says is true. How can he most help humanity?

Everyone believes everything Joe says. How can he get around it?

A person from medieval times comes into our time. What would he notice first?

Alice has been shrunk! Will she notice?

How could a planet have one hemisphere way warmer than the other without the planet being tidally locked?

What would be the consequences for Earth if the moon disappeared?

Is it possible for a planet’s climate to block, or at least make wireless communication irrelevant?

What if there was no coffee anymore?

Is a "long exposure"-like night sky possible?

How can Elsa's power fuel my Industrial Revolution?

How to wrap the Moon in plastic to make her a giant, supported by the atmospheric pressure, greenhouse

Is there enough fresh water in the world to eradicate the drinking water crisis?

What could a self-sustaining lunar colony slowly lose that would ultimately prove fatal?

How could a submarine-like vehicle steer and propel itself in a superfluid?

How might nuclear power have never been developed?

How feasible is a nuclear powered air liner?

Would Artificial Gravity With Short Range Be Possible?

What services could a time traveller offer a medieval king?

What elements would be created in a star composed entirely of gold?

Elevator through the earth? Yay or Nay

If Earth and the Moon's Relationship Were a Bit Closer

How plausible is it for nuclear power to be invented but not nuclear weapons?

How big of an explosion can you make with a fusion reactor?

How safe it would be to look at the other planet in double-planet system with naked eye?

Could an astronaut in a near-future space ship survive transit through our asteroid belt?

How many humans can I abduct without getting noticed?

How can someone be invulnerable to any damage down to cellular levels while still having a limited lifespan?