Photo of the Day

February 23, 2020

Swan Lake

In this photo from the July 1975 issue, scientists round up tundra swans in Blackwater National Wildlife Refuge, Maryland. The birds, sometimes called whistling swans, were giving tracking bands so that their migration patterns could be studied.

Photograph by BIANCA LAVIES, Nat Geo Image Collection

Go Further

Subscriber Exclusive Content

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