Why do ostriches have wings?
15250
Why do some bad traits evolve, and good ones don't?
150684
Zombies - Why do they need to feed on living animals/humans?
147211
Why are not all species hermaphrodites?
14847
Why do men have nipples?
7386
When does a flying creature start and end falling?
30727
How does Coruscant get food?
83300
Why don't mammals have more than 4 limbs?
65465
Help Needed Identifying Corvids
65970
Are there dextral/sinistral higher animals?
26156
What really allows airplanes to fly?
53685
Why do birds sitting on electric wires not get shocked?
135261
How can there be animals on the surface in Zion's world?
143707
How did Trills get the idea of putting symbionts inside themselves?
140182
Are plants creatures or objects?
141348
Is "This is the only mammal that can fly" an independent clause?
50545
Why are humans so variable in appearance
37198
Can an animal evolve after birth?