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 Biosphere

Quick fact

Although the biosphere spans from the upper atmosphere to deep ocean trenches, about 90% of all Earth's biomass is concentrated in the top few meters of soil and the ocean's sunlit surface.

Why this is interesting

You live in a thin, fragile layer of life surrounding Earth—yet this layer is more complex and interconnected than any machine humans have built. What is this layer, and how does it sustain everything we know?