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.
Since the Age of Discovery, we've been toting plants and animals to parts of the world where they don't belong. While most transplants die, some become invasive. How can these newcomers lead to breakneck-pace evolution?
A fascinating article that describes the work of The Nature Conservancy and the benefits of its conservation projects to our environment and ecology!