Greatest-ever debris flow video

It starts slowly, but then ... whoa!

Is El Niño at its peak?

This year's El Niño has likely reached its peak, say scientists, but given that Earth is hotter than in 135 years, there are no guarantees.

X-ray view of Earth’s aurora

An ESA space observatory was looking for something else when it caught these X-ray images of an aurora.

Ancient diamonds hold clues to primeval Earth

New insights into ancient Earth’s early structure from diamonds formed 3.5 billion years ago. A scientist called diamonds "the perfect little time capsules."

Magnitude-7.1 earthquake in Alaska

There were no reports of injuries, but the powerful earthquake left a fair amount of cleanup to do, plus some frightened people in Alaska.

2015 hottest year on record, by far

"What we have seen this past year will likely be routine in about 15 years, although regionally the details will vary considerably," says climate expert Kevin Trenberth.

How to take photos of snowflakes

Try it yourself! With a little preparation and a good camera and with a macro lens, you can take your own photos of snowflakes.

View from space: Mississippi River flooding

Two satellite images show the contrast between the flooded Mississippi River this month and the same area last year. Check out the difference!

Extreme weather lowers global crop yield

Researchers found that extreme heat and drought between 1964 and 2007 account for about a 10% decline in global cereal crop production.

Lifeform of the week: Puffer fish

Killer sushi, stoned dolphins, and zombies; the puffer fish is an animal steeped in scandal.

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