By law, information collected in a U.S. census must remain confidential for seventy-two years.

In ancient Rome, lead poisoning was a prevalent disease amongst the wealthy because of their extensive use of lead. Many Roman women died because of lead poisoning caused by the use of make-up that contained lead.

Post-It Notes, which are adhesive notes, were invented while looking for a way to improve the acrylate adhesive found in tapes.

AMAZING FACTS