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 Formation of Globular Clusters and Their Stellar Populations

Quick fact

Globular clusters are among the oldest objects in the universe, with many dating back over 12 billion years, and they contain the most ancient stars we can observe in detail.

Why this is interesting

You've probably seen photos of dense, ball-shaped swarms of stars orbiting our galaxy. But how did these ancient clusters form, and why do they hold some of the oldest stars in the universe?