文档介绍：Unit
16
Scientists at work
He discovered why all things fall down to earth.
Gravity
Newton
Charles Darwin (1809-1882)
Evolution
The origin of species
Po
Ra
Madam Curie (1867-1934)
Radioactivity
Einstein
When a man sits with a pretty girl for an hour, it seems like a minute. But let him sit on a hot stove for a minute, and it’s longer than an hour. That’s relativity.
Einstein
The theory of relativity
Franklin’s Famous Kite Experiment
Benjamin Franklin
(1706-1790)