The Argentine ant invaded California 100 years ago, forming “super-colonies” that stretch hundreds of miles. Most ants attack nearby nests. Why have Argentine ants declared peace with neighbors?

After its seed sprouts, this parasitic plant must find a host in four days, or else it dies. Solution? Smell the host plant’s unique bouquet.

Neanderthals survived thousands of years longer in Europe, a new study finds. What does this tell us about the demise of the caveman and the triumph of modern humans?

Malaria harms people and mosquitoes. Some skeeters already kill malaria. Shouldn’t we work together to control this global blood parasite?

Small rodents spread lots of seeds in nature, but they were absent from New Zealand. Do giant grasshoppers replace mice and rats in transporting seeds?

How do smart diners decide from an unfamiliar menu? They take advice. Ditto for bees. If they haven’t seen the flowers before, they follow the lead of another bee.

When chickadees see hawks or owls, what do they “say?” Their warning is more complex than expected. In the presence of a really dangerous predator, the warning is more alarming!

Animals watch others and change their behavior to match.

Old museum collection sheds light on vanishing land snails of Polynesia.

New tracking systems watch long-distance migrants move across the ocean. Follow whales, turtles and albatrosses across the watery planet.