Efforts are under way to put more U.S. coastal waters off-limits to fishing and other exploitation.
Peru Holds Oldest New World City Construction of massive ceremonial buildings and residential areas at a Peruvian site began 4,000 years ago, making it the earliest known city in the Americas. A variety of filamentary structures on the fossil of a small theropod dinosaur recently found in China may provide new insight into the evolution of feathers. Honeybees turn out to be the first insect known to change circadian rhythms just because of a social cue, a crisis in the nursery. An abnormal protein associated with Huntington's disease kills cells by stealing another protein needed for cell survival. All rights reserved.