68
dinosaurs
|
18
gravity
× 2 |
7
magic
|
4
asteroids
|
68
civilization
|
12
hard-science
× 2 |
7
prison
|
4
rogue-planets
|
68
medieval
|
12
bronze-age
|
7
psionics
|
4
alternate-history
|
68
protection
|
12
military-defense
|
7
generation-ships
|
4
prehistoric-times
|
53
antimatter
× 3 |
12
terraforming
|
6
relativity
|
4
stoneage
|
48
energy
× 2 |
12
space-constructs
|
6
astronomy
|
3
universe
|
47
planets
× 4 |
12
cataclysms
|
5
technology
× 2 |
2
reality-check
× 5 |
41
alternate-reality
|
8
physics
× 4 |
5
time
|
2
materials
× 3 |
41
biochemistry
|
8
astrophysics
× 2 |
5
computers
|
2
metals
|
41
xenobiology
|
7
ships
|
5
time-travel
|
2
chemistry
|
39
science-based
× 8 |
7
transport
|
5
precognition
|
2
atmosphere
|
39
science-fiction
× 3 |
7
warfare
|
5
hacking
|
2
climate
|
38
black-holes
× 2 |
7
transportation
|
4
natural-disasters
|
1
environment
× 3 |
SurpriseDog
