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

Brain Injury Mitigation

Quick fact

A well-designed bicycle helmet can reduce the risk of severe brain injury by up to 88% by absorbing impact energy and extending the deceleration time.

Why this is interesting

You strap on a helmet before biking, but have you ever wondered exactly how that foam and plastic prevents your brain from sloshing dangerously inside your skull?