Photo of the Day

April 18, 2020

Floating Shade

The Los Angeles Department of Water and Power released millions of black shade balls into the Ivanoe Reservoir to reduce evaporation and deter algal growth.
PHOTOGRAPH BY GERD LUDWIG, 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