Be Smart
Blood Types Are Weirder Than You Think
Why do we have different blood types? And why do we have blood at all?
Latest in
Be Smart
Sponsorship
Be Smart
How Feathered Dinosaurs Accidentally Invented Flight
How did dinosaurs become birds—and what good is half a wing?
Be Smart
What Could We See with a Planet-Sized Telescope?
Just how big would a telescope need to be to actually see an alien world in detail?
Be Smart
Will Earth Run Out of Oxygen
The key enzyme behind photosynthesis isn’t actually all that great at its job.