Tides
...There is no drop of water in the ocean, not even in the deepest parts of the abyss, that does not know and respond to the mysterious forces that create the tide. No other force that affects the sea is so strong. Compared with the tide the wind-created waves are surface movements felt, at most, no more than a hundred fathoms below the surface....
American marine biologist and writer. Born on her family's farm near Springdale, Pennsylvania, Carson received a B.A. from Pennsylvania College for Women (now Chatham College) and an M.A. from Johns Hopkins University. She joined the U.S. Bureau of Fisheries in 1936, and wrote highly-acclaimed books on sea life: Under the Sea Wind (1941), The Sea Around Us (1951), and The Edge of the Sea (1954). Her most influential book, Silent Spring (1962), exposed the dangers of the use of pesticides, particularly DDT. This work led to a presidential commission that recommended a ban on the use of DDT in American agriculture, and eventually to the establishment of the Environmental Protection Agency. Revered as a founder of the modern environmental movement, Carson was posthumously awarded the Presidential Medal of Freedom. See also rachelcarson.org. 