World Facts

Octopuses have three hearts and blue blood

Two hearts pump blood to the gills; the third pumps it to the rest of the body. Their blood is blue because it uses copper-based hemocyanin.

Honey never spoils — jars found in Egyptian tombs over 3,000 years old were still edible

Honey's low moisture and acidic pH create an inhospitable environment for bacteria.

The Pacific Ocean is the largest ocean, covering about 30% of Earth's surface

It is larger than all of Earth's land area combined — roughly 165 million square kilometers.

A day on Venus is longer than a year on Venus — one rotation takes 243 Earth days

Venus also rotates in the opposite direction to most planets, so the Sun rises in the west.

Bananas are naturally radioactive because they contain the isotope potassium-40

You'd need to eat about 10 million bananas at once to get a fatal dose of radiation.