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4 votes
3 answers
192 views

Is it possible for plant life to evolve (and adapt) on a low CO2 planet?

6 votes
3 answers
1k views

Would human-shaped sperm cells work?

2 votes
2 answers
108 views

Can mammal hypothetically evolve their own version of unidirectional breathing?

-2 votes
0 answers
68 views

How can a respiratory/vocalization system support both ingressive and egressive speech?

7 votes
4 answers
2k views

How could breastfeeding/suckling work for a beaked animal?

-1 votes
1 answer
106 views

How could small animals survive a decade in this world?

2 votes
2 answers
82 views

Role of mouth size in ability to replicate human phonemes

11 votes
8 answers
3k views

Mechanism behind a pink human skeleton

3 votes
1 answer
116 views

Is it reasonable that my human-habitable alternate universe look different?

31 votes
9 answers
5k views

Can a dragon's fire breath be liquid based?

12 votes
6 answers
3k views

Can a planet have a warm, tropical climate both at the poles and at the equator?

8 votes
12 answers
2k views

Is it reasonable that the people of Pandemonium dislike dogs as pets because of their genetics?

2 votes
2 answers
420 views

How would living underground (bioluminescence) affect a humanoid race?

6 votes
1 answer
715 views

Can a Tidally-Breathing Animal Possess a Syrinx?

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