When it takes over ecosystems, this invader causes soils to surrender their carbon and release it as greenhouse gas.
This spring, the racehorse California Chrome won the first two legs of the Triple Crown. If he wins, he will be the first Triple Crown winner in 36 years and only the 12th horse in history to do so.
New research suggests plants are riding a calcium wave just to survive in the increasingly salty, or saline, soils that have become a problem the world over.
Eyes and wings are among the most stunning innovations evolution has created. Remarkably these features have evolved multiple times in different lineages of animals.