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 Cosmic Dust in Interstellar Chemistry

Quick fact

Hydrogen molecules (H₂) form on the surfaces of dust grains, not in gas phase – without dust, the universe would be almost devoid of molecular hydrogen.

Why this is interesting

The space between stars is not empty – it's filled with tiny dust grains that act as chemical factories, building the molecules that might one day become planets and life.