It's possible store billions of humans as embryos that are grown and raised by robotic parents upon arrival. And it should also be possible to genetically engin

It's possible store billions of humans as embryos that are grown and raised by robotic parents upon arrival. And it should also be possible to genetically engineer those humans to be better suited to that new planet's environment. Though, by the time we figure out how to do that, "we" probably won't be purely biological, naturally evolved beings any longer.