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.

Astronomy

The Habitability of Planets in the Trappist-1 System

Quick fact

Three of TRAPPIST-1's seven planets sit in the habitable zone, yet the star's frequent, powerful flares might strip away their atmospheres, making habitability far more complex than just distance from the star.

Why this is interesting

Imagine seven Earth-sized worlds huddled around a dim red sun. Could any of them be our next home?