Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
The smell of freshly cut grass is actually a plant distress call.
31
The only letter not appearing on the Periodic Table is the letter "J".
180
One 75-watt bulb gives more light than three 25-watt bulbs.
57
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
Hot water can freeze faster than cold water.
181
In the 1950s, the US government placed beer next to an atomic bomb blast to determine if it was still drinkable. The result: in the event of a nuclear war, beer is safe to drink!
16
In the 60s, a scientist gave LSD to dolphins in an attempt to teach them English.
17