The oldest fossil with a neck, Tiktaalik roseae, shows how animals developed a head for living on land.

Planetary scientists have gotten their closest look yet at polar storms on the ringed planet. These polar cyclones are big enough to engulf Earth. (p. 9)

Myth often cited by global warming skeptics debunked. (p. 5)

This dusty library saves the geo-curious a trip to Antarctica.

Featured blog: As glaciers continue to dry up, so does any hope of gleaning information from them about the past climate record.

Trace elements in the carbonate shells of freshwater mussels could serve as an archive of road salt pollution. (p. 16)

Unusual data let scientists test predictions that global warming drives species up slopes.

Recent fossil discovery shows that new species of arthropod formed chains, raising the possibility of communal behavior.

Analyses of trees and other organic material buried in a riverbank near Lake Superior’s northwestern shore shed new light on how much and when the lake level varied soon after the last ice age.

Paleontologists and aeronautical engineers are designing a reconnaissance drone that will mimic the flight of an ancient flying reptile.

The NASA MESSENGER spacecraft completed its second flyby of Mercury, yielding crisp new images of a large swath of the planet not seen before. (p. 8)