The last star in the universe will be a red dwarf. Red dwarfs in general might be great places to look for aliens - or planets for humans to find a new home after our solar system has died.
Is there a border we will never cross? Are there places we will never be able to reach, no matter what? It turns out there are. Far, far more than you might have thought.
Humans. We have been around for a while now. When we think about our past we think about ancient civilizations, the pyramids, stuff like that. But this is only a tiny, tiny part of our history.
