Sailing ships may experience days of calm in this ocean region near the Equator
Hey, man! - that's heavy hydrogen
The material left behind by a retreating glacier or the slow movement of the continents
In 1837 this French theatrical designer invented a new type of photography
In 1875 this plant breeder moved to California using profits earned on his potato
A 1991 photo of Gaspra taken by the Galileo probe was the first close-up of one of these minor planets
This green plant pigment is also found in algae & in some bacteria
It's defined as an atom or group of atoms that has an electrical charge
In the 1940s this Nobel Prize winner & vitamin C advocate studied the structure of antibodies
A species of this 10-armed animal is the largest invertebrate, reaching a length of over 50 feet