The savannas and grasslands of Africa support dozens of grazing herbivores, with enormous animals like rhinos and elephants living largely in peace alongside impalas and wildebeests. However, research ...

Texas has a wide variety of invasive species, from beaver-sized nutria rodents to the one inch zebra mussel. Invasive species can harm ecosystems and cost U.S. taxpayers $137 billion annually. Zebra ...

John Rylaarsdam’s farm, near the towns of Quincy and George in Eastern Washington, receives about seven inches of rainfall each year. But he says it takes 25 to 30 inches of water to produce the ...