News

Paleontology

Oldest dog debated

A fossil jaw may, or may not, come from the oldest known example of man’s best friend.

Planetary Science

Hole from on high

Researchers discover a fresh meteorite impact crater using Google Earth.

Ecosystems

Gut first

A crawling caterpillar’s gut moves forward before the rest of its body does.

Animals

Fearless tadpoles give invaders the edge

Clueless larvae don’t heed the scent of nonnative turtles, giving newcomers an edge over native species, a European study finds.

Health & Medicine

Diet and behavior changes may slow Alzheimer’s

A new study in dogs finds that antioxidants and enriched lifestyle can ward off symptoms, and suggests brain plaques may not be the cause of the disease.