Photo of the Day

Woman diver holding algae and showing it to another woman through a window of an underwater habitat
February 11, 2021

Sea Science

Oceanographer Sylvia Earle shows engineer Peggy Lucas a handful of algae through the window of the Tektite habitat. They were two of five women who lived in the underwater habitat for two weeks in 1970, studying various aspects of marine life.
Photograph by Bates Littlehales, Nat Geo Image Collection
Create a free account to continue and get unlimited access to hundreds of Nat Geo articles, plus newsletters.

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

Create your free account to continue reading

No credit card required. Unlimited access to free content.
Or get a Premium Subscription to access the best of Nat Geo - just $19