💡 Động vật — Sự Thật Thú Vị

Rats laugh when they are tickled.

When rats play or are gently tickled, they make high-pitched chirps that are too high for us to hear without special equipment. Scientists link these sounds to happy feelings — a little like human laughter.

A snail can sleep for up to three years.

When the weather is too dry or too cold, some snails seal themselves inside their shell with a layer of dried mucus and enter a deep resting state (called estivation or hibernation). It usually lasts weeks or months, but in extreme conditions can stretch to about three years.