Iron weighs more after it rusts.
16
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
Research indicates that plants grow healthier when they are stroked.
173
Out of all the senses, smell is most closely linked to memory.
146
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
Your brain is 80% water.
525
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5