After decades of debate, researchers say that they have found the clearest evidence yet for this rare form of carbon.

Much of our understanding of Earth's past is derived from stratigraphic records exposed in rock outcrops or recovered from drilled cores. These records span immense time intervals, from thousands to ...

The letters lobbyists submit to the Legislature are public documents, but they are hidden from view. Two California lawmakers want to change that ...

Successful group work in middle and high school requires thoughtful design. These strategies help teachers structure collaboration so every student contributes—and learns.