Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
46
MDIF, a New York based non-profit organisation, is planning to beam free Wi-Fi to the entire world from space.
18
There are more nerve cells in the human brain than there are stars in the Milky Way.
349
Pluto is smaller than Russia.
9
From the nitrogen in our DNA, to the calcium in our teeth, the iron in our blood, to the carbon in our apple pies - all were made in the interiors of collapsing stars; we're all made of stardust.
22
It takes a photon 170,000 years to travel from the core of the Sun to the surface, but only 8 minutes to travel the rest of the way to Earth.
6