This one of the 6 simple machines consists of a bar resting on a fulcrum
The name of this lightest of all metals, symbol Li, comes from the Greek for "stone"
Surprisingly, the smooth soft-shell species of this reptile is said to be able to run as fast as a man
When it flows out of the earth, it becomes lava; when blasted into tiny fragments, it becomes volcanic ash
Common fuels in rockets include liquid hydrogen & LOX, which stands for this
This tusked pinniped has air sacs in its neck enabling it to keep its head above water while sleeping
This 16th century professor at the University of Padua is called the "Father of Modern Anatomy"
One of Galen's favorite animals to dissect was this "ape" of Gibraltar
In 1894 Kitasato found the bacillus that caused this scourge of the Middle Ages
Alfred Lovell's Jodrell Bank radio telescope was finished in 1957 just in time to track this 1st artificial satellite