A Tradition for US Presidential Candidates: The Iowa State Fair
Democratic presidential candidate Julian Castro
Democratic presidential candidate Julian Castro
Sun sets near Milan, Italy
Rivers of melting water form on an ice sheet
Hyundai’s solar roof system
A sign warning of lettuce shortages
The mask, hair and clothing worn by Clauvino da Silva
U.S. Nobel literature laureate Toni Morrison
Gamers play Call of Duty: Black Ops 4
A South Korean army soldier