[ajuc]

a dozen out of millions of species is not "pretty common"

[JoeAltmaier]

Many convergent evolution paths led to the same similar form, in time. That was the point. If the environmental pressures are similar, the forms may be similar.

[asah]

100.0% of spacefaring earth creatures are bipedal /s

[excitom]

Dogs have been send into space

[asah]

They were sent, not by choice = not spacefaring! /s