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.

Economics

Loan Agreements

Quick fact

The first known loan agreements date back to ancient Mesopotamia around 2000 BCE, recorded on clay tablets.

Why this is interesting

You've lent a friend $20 and they promised to pay you back—but what happens when a bank lends you hundreds of thousands for a house? What makes that promise legally binding?