By studying twins, scientists help us understand what makes people who they are.

A long-term study of dolphins living off Australia’s coast finds that a small number of them, mostly females, frequently use sea sponges to forage for fish on the ocean floor. (p. 13)

Equal sausage demanded for equal paw shakes. (p. 13)

Virus could explain one symptom of colony collapse. (p. 5)

Edward O. Wilson of Harvard University has written and lectured widely in fields ranging from sociobiology and evolutionary psychology to conservation biology. He spoke recently on “sustainability” at Baldwin-Wallace College in Berea, Ohio. Wilson believes that too much emphasis has been placed on trying to reduce energy consumption and avert climate change—what he calls the “physical environment”—and too little on preserving habitat and biodiversity, or the “living environment.” For Wilson, preserving the living environment means protecting areas of the world...

Among male bees that create their own perfume, a change in the sense of smell might mean a split in species.

Silver demonstrates some unusual immunological impacts at the nanoscale.

Featured blog: Pollutants at sea can slow critters' sperm or induce DNA damage.

First human DNA extraction from hair bits in moth larval case. (p. 12)

A seed-loving insect finds food by sensing its temperature.