Saved on this device

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.

Biology

Behavioral Thermoregulation in Ectothermic Reptiles

Quick fact

Desert iguanas can regulate their body temperature so precisely through behavior that they maintain it within a narrow range of about 37°C, even when air temperatures swing from 20°C to over 45°C during the day.

Why this is interesting

Ever watched a lizard sunbathing on a rock, only to dart into the shade moments later? That seemingly simple behavior is a life-or-death calculation—how do reptiles, which can't generate their own heat, keep their body temperature just right?