Yes, those are people: A still image from a drone video filmed inside the world's largest cave shows cavers standing beneath one of two large skylights in Vietnam's Hang Son Doong.
Ryan Deboodt /Vimeo
Spider Martin's most well-known photograph, Two Minute Warning, shows marchers facing a line of state troopers in Selma moments before police beat the protestors on March 7, 1965. The day became known as Bloody Sunday.
Spider Martin/Courtesy Tracy Martin
The mother and daughter, displaced from their homes in Sudan, sit beneath a mosquito net while being treated for malnutrition at the Kalma camp in South Darfur. This is a 2005 photo.
Lynsey Addario/Courtesy of Penguin Press