User aphenine

24 votes

Could a Spaceship Enter/Exit the Atmosphere Without Landing

answered Apr 3, 2017 at 22:04

17 votes

How did aliens on a habitable planet hide themselves during the recon and scouting stage by human colonists?

answered Apr 10, 2020 at 0:46

12 votes

Is it possible that technologically-capable, spacefaring species would depend on a single source of food?

answered Jan 28, 2017 at 14:25

8 votes

How would it affect a human to suddenly hear like a cat?

answered Jan 24, 2017 at 0:12

5 votes

In an elliptical orbit, where should a rocket fire its engines for maximum efficiency?

answered Apr 5, 2017 at 3:57

4 votes

Accepted

What are some alternative methods of perception on 'dark' worlds?

answered Jan 22, 2017 at 0:07

3 votes

Accepted

Instant army with nanites

answered Jan 22, 2017 at 0:51

3 votes

If 1 million people were plucked from the Earth today and put on a new planet, how long would it take for a civilization to arise?

answered Jan 22, 2017 at 3:16

3 votes

Evolution of technology in an underground civilisation?

answered Jan 22, 2017 at 16:59

3 votes

Wings made of force fields?

answered Apr 4, 2017 at 18:49

3 votes

Male psychology in a matriarchy

answered Feb 23, 2017 at 7:19

2 votes

Would a 4-dimensional being be able to see inside other people?

answered Apr 24, 2017 at 9:25

2 votes

How long before evolutionary traits revert or change?

answered Feb 3, 2017 at 21:49

1 vote

What would happen to life on Earth if the atmosphere was covered by a blanket of shadow (NOT clouds)?

answered Feb 12, 2017 at 21:10

1 vote

Habitable space bridge?

answered Jan 28, 2017 at 14:16

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15 Answers

Could a Spaceship Enter/Exit the Atmosphere Without Landing

How did aliens on a habitable planet hide themselves during the recon and scouting stage by human colonists?

Is it possible that technologically-capable, spacefaring species would depend on a single source of food?

How would it affect a human to suddenly hear like a cat?

In an elliptical orbit, where should a rocket fire its engines for maximum efficiency?

What are some alternative methods of perception on 'dark' worlds?

Instant army with nanites

If 1 million people were plucked from the Earth today and put on a new planet, how long would it take for a civilization to arise?

Evolution of technology in an underground civilisation?

Wings made of force fields?

Male psychology in a matriarchy

Would a 4-dimensional being be able to see inside other people?

How long before evolutionary traits revert or change?

What would happen to life on Earth if the atmosphere was covered by a blanket of shadow (NOT clouds)?

Habitable space bridge?