User J.D. Ray - Worldbuilding Stack Exchange

J.D. Ray

Member for 7 years, 11 months
Last seen more than a week ago

Portland, Oregon

18 Answers

Score Activity Newest

7 votes

How to bootstrap technological development from one man in the forest, to building a spaceship?

answered May 1, 2015 at 19:51

3 votes

How would lighthouses work in space?

answered Mar 10, 2016 at 21:54

3 votes

Can I build a self sufficient medieval city?

answered Mar 22, 2016 at 22:31

3 votes

Is it realistic that mountain cultures use a different calendar than the low landers?

answered Mar 12, 2020 at 22:22

2 votes

Adjusting to changes in gravity and pressure

answered May 1, 2015 at 20:13

2 votes

For how long could a modern tank survive in a past war?

answered Apr 25, 2016 at 21:48

2 votes

What would the buildings in a city on a marsh be made of?

answered Oct 9, 2018 at 18:07

1 vote

What would be the most-optimal location for the Lunar Radiotelescope?

answered May 20, 2016 at 17:07

1 vote

Can a star be so distant/isolated that its 'Earth' can't see other stars?

answered Jan 28, 2016 at 22:35

1 vote

Terraforming Mars with a comet

answered Apr 16, 2016 at 1:47

1 vote

Time-traveling Combat

answered May 3, 2015 at 6:07

1 vote

The new Space Race - Racing!

answered May 7, 2015 at 18:16

1 vote

How many people are required for a healthy re-population of the Earth (Post-Apocalypse)?

answered Mar 15, 2016 at 23:27

0 votes

What kind of wingspan does a large aircraft need?

answered Sep 4, 2015 at 23:09

0 votes

How to cause an exodus from the west coast of the United States inland?

answered Apr 13, 2016 at 17:01

0 votes

What it takes for body armor to stop a .50 cal?

answered Feb 8, 2019 at 20:23

-1 votes

How to effectively slow down a ship about to shoot through the Solar System at 0.6c?

answered Apr 25, 2016 at 20:38

-1 votes

How and when could a Dyson sphere civilization figure out the shape and size of their sphere?

answered Mar 28, 2016 at 18:36