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.

Medicine

Designing Controlled Double-Blind Placebo Trials

Quick fact

In a double-blind placebo trial, neither the participants nor the researchers know who is receiving the actual treatment, which prevents both conscious and unconscious bias from influencing the results.

Why this is interesting

You've probably heard that a new 'wonder drug' is 90% effective—but how do we actually know it works and isn't just a sugar pill?