Large shifts in UV radiation at Lake Tahoe are associated with wet and dry climate extremes, finds a UC Davis study.

Astronomers have filled a large gap in knowledge about Mars' water cycle. Their research on water percolating from surface to ...

The UN Ocean Conference promises to be a rare event at which most of the key players are in the same location and free of the ...

Billions of years ago, water flowed on the surface of Mars. But scientists have an incomplete picture of how the red planet's ...