Life on other planets
31077
Why must a planet be in a star's "habitable zone" to have life?
54446
Story about living planet linked to skin lesions
44311
The Cracks in the Universe: Why are they lethal to some, but not to others?
98407
Looking for a (short?) story about a cryo ship looking for habitable planets
153435
Elliptical orbits of planets
62707
Short story about a woman that travels to other planets. Read online recently. She just manages to live long enough to embrace new technology
36836
What happens to the worlds that don't want to join the United Federation of Planets?
85456
Are there any other planets besides Arda in Ea?
123838
Book about a planet covered in very, very long necked aliens
96187
Changing the definition of life?
114934
Bootstrap Paradox in Interstellar
128681
Is the Xenomorph life cycle based on the life cycle of a real world species?
31189
Why is it thought that silicon based lifeforms never flourished on Earth?
72061
Looking for a book about a crystal like prison planet
12720
Short Sci-fi story about a sentient planet/creature that exists to seed the universe with life
102347
Children's SF book about moon folk going to live on another planet
131908
short story about astronauts/colonists in a hostile planet