Brad Plumer

More towns are cracking down on light pollution at night.

And it’s unclear how many wells might be poorly constructed.

This is only the second adult ever found — 11 feet long and 770 pounds.

It now kills 4 million people each year — more than malaria and AIDS combined.

These storms aren’t expected to be catastrophic. But it’s a reminder that the sun is capable of much worse.

A very simple, concise illustration of how the world is failing at its climate goals.

The world actually got together and stop a major environmental crisis before it’s too late.

Aerial views from NASA’s Earth Observatory.