James W. Marshall was building a sawmill for John Sutter, and was using water from the American River. In the river, he found gold.
Lorenzo de Medici
Alfred wegener
The Moon is the natural satellite of the Earth, so the person who discovered it was probably Ugghhh, the First Caveman. Artificial satellites weren't developed until the 1950's, and so the "discoverer" was one of the Soviet engineers who launched the first Sputnik, the first artificial satellite of the Earth. Other planets have their own satellites. Galileo is credited as discovering the four largest satellites of Jupiter in January, 1610, when he pointed his new telescope at Jupiter.
Sir Isaac Newton
Brunelleschi
radium
discovering
Christopher Columbus was an early explorer. He is credited with discovering the Americas.
Europe is the country credited with discovering America.
Euclid
I'm not exactly sure what you mean when you say "discovering." However, Alexander Graham Bell is credited for inventing it. -THE SMOKE LIVES
Ernest Rutherford is credited with discovering the nucleus of an atom in 1911 during his famous gold foil experiment.
leif erikson
Columbus
Martinus Beijerinck in 1898.
Marie Curie
Sir Humphry Davy in 1808