...all of these things fit in your pocket.

This is all the water on Earth and the air in our atmosphere, to scale. That's 1.4087 billion cubic kilometres of water and 5,140 trillion tonnes of air.

Here's how 9,000 years of selective breeding has changed corn from a wild grass - that required a hammer to peel - to the juicy yellow ears of deliciousness we know today.

So, how come being cold doesn't actually give you a cold? Check out our video on the topic for answers!

Not much of a believer in dwarf planets, but here's a cool schematic of some.


In 2006 the organization responsible for classifying celestial bodies, the International Astronomical Union, decided that a new class of objects was needed. The solar system's erratic ninth planet, Pluto, was assigned to the new “dwarf planet” category along with four other bodies, all tinier than Earth’s moon. Some astronomers expect there may be as many as 50 dwarf planets in the solar system.

Eris, the largest dwarf planet, is only slightly bigger than Pluto, at 1,445 miles in diameter (2,326 km). Discovered in 2003, Eris orbits at an average distance of 68 AU (that is, 68 times the Earth’s distance from the sun) and takes 561.4 Earth years to circle the sun. E ...