Astronauts cannot cry in space because tears do not fall — they form floating blobs around the eyes.

Humans can survive extreme cold longer than extreme heat.

The microwave oven was invented accidentally when Percy Spencer noticed a radar magnetron melted a chocolate bar in his pocket.

Crows can remember individuals who previously threatened them.

A raw potato is toxic if eaten in large quantities due to solanine — cooking destroys the compound.

The surgeon's checklist, based on aviation safety protocols, has reduced surgical deaths by over 40% in hospitals that use it.

Heatwaves can pose serious risks to human health.

Coffee is the world's second most traded commodity after oil.

The word 'salary' comes from the Latin 'salarium,' referring to payments made to Roman soldiers in salt.