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.

Physics

Kinematics

Quick fact

A bullet dropped from a height and a bullet fired horizontally from the same height will hit the ground at exactly the same time (ignoring air resistance)—a classic demonstration of kinematics at work.

Why this is interesting

You've probably seen a ball thrown into the air or a car accelerating from a stop—but how can we predict exactly where that ball will land or how far the car will travel?