Snow is made up of trillions of tiny ice crystals to make snowflakes, with not one alike. Here's how they form.

The exosphere is the outermost layer of Earth’s atmosphere, where space begins. It has almost no air, and satellites orbit ...

Mariposa California's original daily updated online newspaper is the premier site for news and information on Yosemite, Mariposa, California and United States ...

Meteorologists warn that the coldest burst of Arctic air this season is coming to put an icy and prolonged exclamation point ...

Earth is crossing the threshold of 1.5°C of global warming, according to two major global studies which together suggest the ...

A private company couldn't match the Boulder-based federal agency's work...but scientists worry the Trump administration could propose just that.

After a winter storm this weekend, the polar vortex will return, bringing subzero temperatures to around 80 million people ...

Humanity may not be extraordinary but rather the natural evolutionary outcome for our planet and likely others, according to a new model for how intelligent life developed on Earth.

How much did it rain in Sacramento? Since the start of the storm systems at the end of January, Sacramento Executive Airport received 4.44 inches of rain, according to Hand. Betwe ...

YR4 has a 2% chance of hitting Earth in 2032. Astronomers are tracking it to refine estimates of its size and orbit to see how much of a risk the space rock poses.

Initially developed by theoretical physicist Brandon Carter in 1983, the “hard steps” model argues that our evolutionary ...