Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
Sound at the right vibration can bore holes through a solid object.
134
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
Your brain is 80% water.
525
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
Aluminum used to be more valuable than gold!
84