Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
The hair of an adult man or woman can stretch 25 percent of its length without breaking.
116
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
The smell of freshly cut grass is actually a plant distress call.
31
Nuclear power prevented an average of over 1.8 million deaths between 1971-2009 as a result of lower air pollution from reduced coal usage according to NASA.
5
Research indicates that plants grow healthier when they are stroked.
173
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