Photo of the Day

March 1, 2020

Eye, Eye

A close-up view of an Atlantic bay scallop reveals its many blue eyes. The eyes can detect light and movement, and the surrounding tentacles can sense threats.

PHOTOGRAPH BY PAUL ZAHL, 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