Book where planets are on different levels of development
23113
Story with multiple 'third planet' races
53517
Trying to Remember a Book that explored evolution of Dinosaurs to intelligence and then encountering humans
16021
Book where characters have powers that get stronger as they get closer to the center of the world
45357
Science fiction/fantasy novel about a god returning to Earth to reclaim his powers
1240
Books for general relativity
127430
Novel where pyramids "grow" and change Earth's magnetic field?
127124
Looking for a book about the moon being a spaceship with an AI
11855
Hunger games style alien book
17094
Identity novel, short story or book series... slower than light space battles, time dilation and boardings, several planets
26391
SF Story about human adapting to alien environment
95235
Story about a sentient star system, in a 50s or early 60s anthology
74048
Looking to Identify Book that has a large Leviathan type ship on the front
39091
Book about classical mechanics
39744
Story with a 3-layered world
23278
Books on cosmology
154417
help remembering book title - multiverses/bladerunner-ish future. "sphere of influence. 2150"?
55991
Book where human thoughts are affecting the universe