Cold water weighs more than hot water.
93
During photosynthesis, plants emit light humans can’t see, but NASA can see that light from space - and they've even made maps of it!
21
Oak trees produce 2,200 acorns in a season, but each acorn only has a 1 in 10,000 chance of becoming an oak tree.
304
One 75-watt bulb gives more light than three 25-watt bulbs.
57
The smell of freshly cut grass is actually a plant distress call.
31
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
The only letter not appearing on the Periodic Table is the letter "J".
180