Your sense of smell is 10,000 times more sensitive than your sense of taste.

The Earth's mantle lies between the crust and core.

Fact #301 · Human Body

Border collies can learn hundreds of word-object associations.

Fact #1303 · Human Body

The FIFA World Cup is held every four years.

Fact #930 · Human Body

Smiling can influence mood through feedback to the brain.

Fact #951 · Human Body

The Olympic Games are held every four years.

Fact #923 · Human Body

Bees have five eyes.

Fact #356 · Human Body

The Earth's outer core is liquid metal.

Fact #250 · Human Body

The Earth's rotation speed varies slightly over time.

Fact #237 · Human Body