This holiday season brings surprising news about your Christmas tree.

The Red List status of the Saiga antelope has been changed from Critically Endangered to Near Threatened, thanks to effective national and international conservation efforts.

In our everyday classical world, what you see is what you get. A ball is just a ball, and when lobbed through the air, its trajectory is straightforward and clear.

When it comes to greenhouse gases, methane is one the biggest contributors.

In its latest accounting, the International Union for Conservation of Nature finds that more than 44,000 species worldwide are threatened with extinction.

Last month wrapped up a remarkably warm meteorological autumn across the U.S., with the season ranking as the sixth-warmest autumn on record for the nation, according to scientists from NOAA’s National Centers for Environmental Information (NCEI).

Nutrient runoff from agricultural production is a significant source of water pollution in the U.S., and climate change that produces extreme weather events is likely to exacerbate the problem. 

Solar and wind power may be free, renewable fuels, but they also depend on natural processes that humans cannot control. 

Train accidents could be caused by solar storms switching signalling from red to green according to new research examining the impact of space weather.

The shimmering green, red and purple curtains of the northern and southern lights — the auroras — may be the best-known phenomena lighting up the nighttime sky, but the most mysterious are the mauve and white streaks called Steve and their frequent companion, a glowing green "picket fence."