From left: A scene from the video of a car crash test; illustration of a mosquito transmitting the Zika virus; a menstrual shed in Nepal. Insurance Institute for Highway Safety/YouTube; BSIP/UIG via Getty Images; Poulomi Basu/Magnum Emergency Fund hide caption
Researcher Christian Nawroth with Vern, who lives at the Buttercups Sanctuary for Goats in Kent, England. He thinks Vern was looking to be scratched. Courtesy of Christian Nawroth hide caption
A school scene in Uganda. David Turnley/Corbis/VCG via Getty Images hide caption
Stills from a video of a woman pretending to be hit by a stopped car. They're calling her "China's worst actress." YouTube hide caption
No one is sure why the northeastern part of Brazil has been hit so hard with microcephaly cases. Felipe Dana/AP hide caption
From left: Emmanuel Kwame lost his sight to river blindness as a young man in Ghana; a bed net keeps mosquitoes away from a mother and child in a Somalian hospital; extracting a guinea worm from an infected person. Getty Images and NPR hide caption
The author, far right in both photos, and some of his siblings in 1980 and in 2015. Courtesy of Edward Mabaya hide caption
A woman is vaccinated at a health center in Conakry, Guinea, during the clinical trials of a vaccine against the Ebola virus. Cellou Binani/AFP/Getty Images hide caption
Clockwise from upper left: Dr. Forster Amponsah; a Malick Sidbe photo taken in Mali; a global garden of radio; Chewa the TB-sniffing rat; another Sidbe photo; Olympic medalist Fu Yuanhui of China; the New Mexico cave where a superhero bacterium lived; poverty fighter Sir Fazle Hasan Abed; calligrapher Sughra Hussainy; activist Loyce Maturu. Jason Beaubien/NPR, Courtesy of Malick Sidibe and Jack Shainman Gallery, Katherine Streeter for NPR, Maarten Boersema/APOPO, Gabriel Bouys/AFP/Getty Images, Courtesy of Max Wisshak, Courtesy of BRAC, Ben de la Cruz and Toya Sarno Jordan/NPR hide caption
This is an example of a hut where a woman in Nepal who is menstruating will spend the night. The photo was taken in Achham district, in the western part of the country, where a teenager died in a mud menstrual hut this past weekend. Poulomi Basu/Magnum Emergency Fund hide caption
One of the fleet of turboprop ATR planes from Pakistan International Airlines. After a Dec. 7 crash, the ATRs were grounded — and resumed flying (after a goat sacrifice) on Sunday. Farooq Naeem/AFP/Getty Images hide caption