Say, Thomas (1787–1834), a United States naturalist. He wrote the first major American works on insects (American Entomology, 3 volumes, 1824–28) and shells (American Conchology, 2 volumes, 1830–34). Say was born in Philadelphia. He served as zoologist on the United States government expeditions, led by Stephen H. Long, to the Rocky Mountains (1819–20) and the source of the Minnesota River (1823). Say was curator of the American Philosophical Society, 1821–27, and professor of natural history at the University of Pennsylvania, 1822–28. He was a founding member of the Academy of Natural Sciences in Philadelphia.
The co-winners of the 2006 Nobel Prize in medicine are two U.S. scientists who discovered a process called RNAi.
As the world's population booms, we'll need more farmland to grow all the food it takes to feed everyone. Where are those farms going to be? Could it be build up instead of out?