Photo of the Day

Picture of an armed guard protecting a rhino in Kenya
July 31, 2021

Standing Guard

An armed guard in Meru National Park, Kenya, protects endangered white rhinos from poachers. Rhinos have been under threat for decades, with the northern white rhino subspecies going extinct in the wild in 2018.
Photograph by Steve Raymer, 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