Milkweed Butterflies Are More Murderous Than They Look

This behavior by the fluttering insects was so unusual that scientists had to invent a new word to describe it.

It’s a Grizzly Bear Survival Program. For Grizzly Bears.

In British Columbia, researchers have undertaken a unique challenge: tracking orphan grizzly cubs, reared in a shelter, to see whether they can thrive back in the wild.

Protected Habitat, for a Population of One

Fifty years ago, Marty Bluewater fought to keep his home among the nesting birds of Protection Island. Now he’s fighting for the birds.

15 Chinese Elephants Are on a Long March North. Why, No One Knows.

The elephants have roamed 300 miles across southern China, in the longest movement recorded in the country by the animals. Researchers are mystified.

Biden Aims to End Arctic Drilling. A Trump-Era Law Could Foil His Plans.

The administration suspended leases that were auctioned in the waning days of the Trump White House. But a 2017 law requires another sale.

Biden Administration Defends Huge Alaska Oil Drilling Project

The administration says the country must pivot away from fossil fuels but backed a project set to produce more than 100,000 barrels of oil each day for 30 years.