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
Scientists at the Zhejiang University in China have developed an ultra-light material known as carbon aerogel.
3
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
A ball of glass will bounce higher than a ball made of rubber.
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The smell of freshly cut grass is actually a plant distress call.
31
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39