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.

Technology

Aerogel-Based Thermal Insulation for High-Temperature Aerospace Applications

Quick fact

Aerogels are the lightest solid materials on Earth, with a silica aerogel holding the record for low density, often called 'liquid smoke' because of their translucent appearance.

Why this is interesting

Space shuttles and rockets face temperatures that can melt steel. How can a material that is 99% air protect them from that heat?