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 Role of Solar Wind in Shaping Planetary Atmospheres

Quick fact

Mars is losing about 100 grams of its atmosphere every second because the solar wind erodes it, and scientists think this loss helped turn Mars from a warm, wet world into the cold desert it is today.

Why this is interesting

You've probably noticed the Sun's glow, but did you know that a relentless invisible wind from it can strip away a planet's air? What does that mean for Mars and for our own future?