Sartore was a National Geographic photographer in the field taking photographs all over the world. He utilized his sense of humor to capture magazine-worthy human interest pieces and unique ...

Learn more about the ancient footprints found in Greece, which could upend theories on hominin emigration from Africa.

To honor Koko's memory, National Geographic is republishing "Conversations ... hand speech of the deaf—Koko has made us, her human companions, aware not only that her breed is bright, but ...