Setting Sail on the Winding Waterways of California’s Delta

The sprawling 1,250-square-mile system of water and farmland in Northern California is a four-season destination for watersport fans and home to many riverbank communities.

Opinion | Was the Decision on Boosters Bungled?

Readers discuss the government’s handling of the issue. Also: Abortion stories; criminal justice reform; voice recognition; extinct species.

Opinion | We’re Living Through One of the Most Explosive Extinction Episodes Ever

The growing damage to the world’s biodiversity presents dire risks to human societies.

Biden Administration Restores Bird Protections, Repealing Trump Rule

The Trump-era rule protected oil, construction and other industries from liability if they killed or injured birds while doing business.

Protected Too Late: U.S. Officials Report More Than 20 Extinctions

The animals and one plant had been listed as endangered species. Their stories hold lessons about a growing global biodiversity crisis.

Protected Too Late: U.S. Officials Report More Than 20 Extinctions

The animals and one plant had been listed as endangered species. Their stories hold lessons about a growing global biodiversity crisis.

Volcanic Eruptions Helped Dinosaurs Dominate Planet Earth

Massive eruptions transformed the climate in the Triassic era, creating the conditions in which dinosaurs diversified into many more species.

Endangered African Penguins, With Multiple Bee Stings, Are Found Dead

Dead bees were found near where the birds died at a park in South Africa, said officials, who suggested the bees may have become aggressive after their nest was disturbed.

Endangered African Penguins, With Multiple Bee Stings, Are Found Dead

Dead bees were found near where the birds died at a park in South Africa, said officials, who suggested the bees may have become aggressive after their nest was disturbed.

The Rock That Ended the Dinosaurs Was Much More Than a Dino Killer

In seeking the origin story of the Chicxulub impactor, scientists hope to also unlock secrets about the origin of life itself.

A New Company With a Wild Mission: Bring Back the Woolly Mammoth

With $15 million in private funding, Colossal aims to bring thousands of woolly mammoths back to Siberia. Some scientists are deeply skeptical that will happen.

ADN y suerte: la fórmula para reunir a una elefanta huérfana y su mamá

Nania ha sobrevivido a la separación de su familia de elefantes del bosque en Burkina Faso. Sus cuidadores esperan que las pruebas de ADN ayuden a devolverla a la naturaleza con su familia.

Komodo Dragons Are Now Endangered and ‘Moving Toward Extinction’

A top conservation organization updated the status of the fierce giant lizards on its Red List of threatened species.

‘Spaceship-Shaped’ Fossil Reveals Hungry Predator of Ancient Oceans

Titanokorys gainesi, turned up in the Canadian Rockies, was among the largest known predators 500 million years ago.

Threatened Birds Have a Defender on N.Y. Beaches: The Plover Patrol

A group of volunteers patrols beaches where endangered Piping Plovers nest.

Reuniting an Orphan Elephant and Her Mom, Perhaps, With DNA and Luck

Nania beat the odds to survive separation from her forest elephant family in Burkina Faso. Her caretakers hope DNA testing may help return her to the wild with her family.

Reuniting an Orphan Elephant and Her Mom, Perhaps, With DNA and Luck

Nania beat the odds to survive separation from her forest elephant family in Burkina Faso. Her caretakers hope DNA testing may help return her to the wild with her family.

New Research Helps Explain a Sudden Population Crash for Rare Whales

North Atlantic right whales had been making a slow recovery, but ocean changes linked to global warming are pushing down their numbers again, scientists say.

New Research Helps Explain a Sudden Population Crash for Rare Whales

North Atlantic right whales had been making a slow recovery, but ocean changes linked to global warming are pushing down their numbers again, scientists say.

This Brain Remained Intact in a 310 Million-Year-Old Fossil

The discovery suggested that horseshoe crab brains haven’t changed much and that there are more ways for soft tissues to be preserved in the fossil record.