Aluminum used to be more valuable than gold!
84
Iron weighs more after it rusts.
16
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
It takes a photon 170,000 years to travel from the core of the Sun to the surface, but only 8 minutes to travel the rest of the way to Earth.
6
Scientists aren't sure what color dinosaurs were.
312
Billions of neutrinos pass unnoticed through your body every second.
6
One ragweed plant can release as many as one billion grains of pollen!
51
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75