Fast Facts: April 11

Arizona Daily Wildcat

  • Hard hats, worn by construction workers, were first used in the building of the Hoover Dam in 1933.
  • Hydrogen is the most common atom in the universe.
  • If all of the gold sitting in the oceans and seas were mined, every person in the world would get about 44 pounds of gold each.
  • In Australia, a dust devil is called a “”willy-willy.””
  • Central air conditioners use 98 percent more energy than ceiling fans.