How do you know that 90% of species are undiscovered if they are undiscovered? how do you know they are there if you haven’t discovered them yet?

Question

Everyone keeps saying its like a list, how does that work?? Do you have like a pokedex where the undiscovered species appear in grey or something like that???

In: Biology

Answer 1

Everything has been discovered, the only stuff that hasn’t are small variations. Like a kind of bird or snake that’s slightly different or a grasshopper pretty much the same as all the others. We know about everything.