Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
Research indicates that plants grow healthier when they are stroked.
173
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
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
Your brain is 80% water.
525
The bark of an older redwood tree is fireproof.
65
Billions of neutrinos pass unnoticed through your body every second.
6