Why are so many gray whales dying in the Pacific?

Scientists struggle to explain why the gray whale population plummeted by nearly a quarter between 2016 and 2020.

An adult gray whale swims off the coast of Baja California Sur. Each winter, gray whales migrate from their feeding grounds in Alaska to tranquil estuaries along Mexico’s Pacific coast. In recent years, an unexplained die-off has reduced the gray whale population by a quarter. In Baja, whales have been arriving later and appear much skinnier than in the past.

Read This Next

Black homeownership thrives in this NYC neighborhood
COVID-19 is now the deadliest pandemic in U.S. history
Influx of Haitian migrants overwhelms Texas border authorities

Go Further

Subscriber Exclusive Content

Why are people so dang obsessed with Mars?

How viruses shape our world

The era of greyhound racing in the U.S. is coming to an end

See how people have imagined life on Mars through history

See how NASA’s new Mars rover will explore the red planet

Why are people so dang obsessed with Mars?

How viruses shape our world

The era of greyhound racing in the U.S. is coming to an end

See how people have imagined life on Mars through history

See how NASA’s new Mars rover will explore the red planet

Why are people so dang obsessed with Mars?

How viruses shape our world

The era of greyhound racing in the U.S. is coming to an end

See how people have imagined life on Mars through history

See how NASA’s new Mars rover will explore the red planet