How did birds evolve anyways. I’m no biologist or whatever but they say whales evolved from cow like things right. So the cows would go in the water and slap a million years on em boom they’re whales. How’s that work for birds. Did all these little animals just jump off cliffs then one day one of them didn’t die? How

And it’s from hopping up into the air then explain why kangaroos can’t fly. Explain that