The bark of an older redwood tree is fireproof.
65
The use of emoticons affects our corresponding brain areas and can actually trigger emotions.
21
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
One 75-watt bulb gives more light than three 25-watt bulbs.
57
Pure water (H2O) does not conduct electricity on its own.
46
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
One ragweed plant can release as many as one billion grains of pollen!
51