[Physicist]

Really, it's of very little consequence that one tortoise evolved from another after two populations had become isolated from one another.

And what is the practical use of knowing about a heliocentric solar system, for anyone not sending a probe to the outer planets?

Useless OUTSIDE of what this tell us of who we are and where we came from.

But that, of course, is one of the primary motivations behind all of human knowledge.

[RadioAstronomer]

for anyone not sending a probe to the outer planets?

Been there, done that. :-)