The bark of an older redwood tree is fireproof.
65
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
A cesium atom in an atomic clock beats over nine billion times a second.
43
Scientists aren't sure what color dinosaurs were.
312
Scientists are working on a portable spray-on-skin that can heal severe wounds in just a few minutes.The spray mainly contains important proteins that can reprogram the injured cells to become stem cells, and back to young uniformed skin cells. So far they were able to accelerate healing process from 12 weeks to 21 days with a similar approach.
16
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39