Now, scientists are in a race against time to classify -– organize into groups -– the estimated 11 million species alive today. Yet only about two million species are known to science. Researchers ...
Tigers are the most powerful cats on the planet. Tigers are also endangered. A new study shows that the animals are far more at risk of extinction than wildlife experts believed.
American researchers spent two summers studying polar bears on the Arctic sea ice. They found that sea ice, where polar bears spend much of their lives, is melting faster than experts predicted it ...
Tens of millions of years ago, an asteroid hit what is now the Yucatan Peninsula of Mexico. The event led to a global mass extinction that has been linked to the end of the dinosaurs. New research ...
Mosquitoes have an extraordinary ability to target humans far away and fly straight to their unprotected skin. Regrettably, mosquitoes can do more than cause an itchy wound.
Fish are animals that live in the water. They are also vertebrates – animals that have a backbone and a spine. They have gills that permit them to take oxygen from the water.
It has taken more than nine years for an American spacecraft to reach the far edge of our solar system. The spacecraft, named New Horizons, sailed past the "dwarf" planet Pluto on Tuesday.