Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
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
The earth is approx. 6,588,000,000,000,000,000 tons.
175
Scientists aren't sure what color dinosaurs were.
312
The only letter not appearing on the Periodic Table is the letter "J".
180
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
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
In zero gravity, a candle's flame is round and blue.
16