Follow your curiosity

What discovery has been shared with you?

FACTREE gives you something interesting to discover every day — and something worth talking about together.

Start with one fact. Explore it, go deeper, then follow whichever branch catches your imagination.

Choose subjects for a surprise

Exploring any topic

Begin your discovery

Your next discovery is one click away.

Choose one or more subjects above, or leave Any Topic selected and let curiosity decide.

Medicine

Concussion Prevention

Quick fact

Only about 10% of concussions involve a loss of consciousness; most happen without the person ever blacking out.

Why this is interesting

You've seen athletes collide and get up dizzy—but why does one hit cause a concussion while another seemingly similar hit does not? The answer lies in how the brain moves inside the skull, and that understanding is the key to prevention.