Astronomers have long warned of a nasty encounter with a large space rock, but don't worry: There's a proposal in Congress to establish a commission to look into it.
The BP oil spill is a unique event, so scientists are converging on the Gulf to try to understand how best to combat deep-sea oil spills and what effects they have on the environment.
The past two months were the warmest March and April on record globally. A new report suggests that communities will need to be adaptable to meet the challenges of global warming.
The Hubble Telescope was launched on April 24, 1990. NASA says the best is yet to come.
This year, more automakers will roll out electric cars to American roadways.
The 'hidden' costs of burning fossil fuels and biofuels aren't factored into their market prices, but someone has to pay them.
Melting ice caps are exposing more of the Arctic Ocean than ever before. The US moves to halt fishing in the newly ice-free zones even before a fishing industry blossoms there.
Column: Looking at hills and valleys on Earth, scientists spot clues on how life affects the land.