Earth’s climate is shifting faster than many models anticipated, and scientists now warn that self-reinforcing feedbacks could push key systems beyond their stable range. Instead of a smooth, ...

Climate change is speeding up the destruction of nitrous oxide in the stratosphere, introducing uncertainty into future greenhouse gases level.

The shift due to climate change is comparable in magnitude to the differences across various emission scenarios currently ...

Planetary scientists have identified a previously unrecognized pathway for water loss on Mars -- observed, for the first time ...

For decades, global temperature averages have been the yardstick by which we measure our planet's fever. Leaders gather at ...

The current image of Mars as an arid and hostile desert contrasts sharply with the history revealed by its surface. Channels, ...