Green
  • Member for 6 years, 7 months
  • Last seen this week
  • Boston, MA
9 answers
125 votes
37k views
18 bookmarks
Releasing a T-Rex into a modern ecosystem wouldn't be that bad, right?
17 answers
61 votes
11k views
9 bookmarks
What would it take to build a ship capable of crossing the Pacific?
16 answers
57 votes
11k views
11 bookmarks
Selling the right to kill one's convicted abuser: how could an NGO make this profitable?
15 answers
50 votes
11k views
14 bookmarks
What good are herbivores in an animal army?
5 answers
43 votes
4k views
15 bookmarks
Why does my species tock like it ticks?
28 answers
41 votes
10k views
8 bookmarks
Why buy tech from the future?
5 answers
40 votes
9k views
17 bookmarks
Only Three Books: Restarting Physics after civilization collapses
2 answers
37 votes
6k views
9 bookmarks
Only Three Books: Restarting Chemistry after civilization collapses
12 answers
34 votes
8k views
4 bookmarks
How would one design an undetectable nuke to hit the Moon with?
5 answers
33 votes
2k views
15 bookmarks
How to evolve biological radios?
18 answers
33 votes
7k views
1 bookmarks
What is the best apex predator to thin the zombie herds?
3 answers
31 votes
6k views
1 bookmarks
A pack of velociraptors in a modern ecosystem, that would be pretty horrible, right?
5 answers
30 votes
2k views
3 bookmarks
How to test a time machine?
10 answers
30 votes
7k views
3 bookmarks
How do I manage memetic infection while time traveling?
16 answers
28 votes
5k views
3 bookmarks
Permitting Customizable UI for a Spaceship's Systems
6 answers
27 votes
6k views
6 bookmarks
What would it take to be an Illuminati-like group?
6 answers
27 votes
1k views
18 bookmarks
How can I make the cultural evolution of my world believable?
8 answers
25 votes
3k views
3 bookmarks
Initial conditions for a fluorine hellscape
17 answers
23 votes
7k views
2 bookmarks
How to defend against the "convince-me" ray gun?
11 answers
22 votes
5k views
7 bookmarks
What if parents didn't "own" their children?
6 answers
22 votes
3k views
13 bookmarks
How do I make the political evolution of my world believable?
6 answers
21 votes
5k views
1 bookmarks
An iron rain to starve a planet
6 answers
21 votes
3k views
4 bookmarks
Exploration of a 50 mile high mountain
6 answers
18 votes
4k views
2 bookmarks
Armor for Giant Crabs to Defeat Explosive Bites from Predators
5 answers
18 votes
3k views
4 bookmarks
How do I manage disease risk while time traveling?
7 answers
17 votes
5k views
Effectiveness of Nuclear Fire in Space
5 answers
15 votes
2k views
2 bookmarks
How to render a large percentage of humans infertile?
11 answers
15 votes
4k views
2 bookmarks
How do you establish identity when people can change their appearance at will?
9 answers
14 votes
6k views
2 bookmarks
Would evolution select for mermaids without breasts?
3 answers
14 votes
738 views
5 bookmarks
Efficiency required of a photosynthetic system to support human level activities