Goffin's Cockatoos play golf in an incredible video. This comes from an experiment exploring their ability to combine multiple objects into one tool, which may shed some light on how humans evolved to use tools.
However, the idea is still "speculative."
Gases are a state of matter with no fixed shape or volume. They have a lower density than solids and liquids.
Does sleeping burn calories? Our team of sleep experts and nutritionists provides the answers