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.

Environmental Science

The Science Behind Ozone Layer Depletion and Recovery

Quick fact

The ozone hole over Antarctica reached its largest size in 2006, covering about 27 million square kilometers. Since then, it has been slowly shrinking.

Why this is interesting

We once punched a hole in the sky’s sunscreen—and then decided to fix it. How did that happen, and is it really healing?