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 Origins of Fast Radio Bursts from Magnetars

Quick fact

In April 2020, a magnetar named SGR 1935+2154, located about 30,000 light-years away in our Milky Way, was caught emitting a fast radio burst in real time—the first such event ever observed from inside our galaxy.

Why this is interesting

Imagine a flash of radio light that releases in a millisecond more energy than our Sun does in a day—except it comes from a city-sized object. What could possibly produce such a blast?