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Australian photographer chases stunning images of thunderstorms
Ten incredible composite images showing scenes from World War I and their present-day locations
On April 20, 1999 two students walked into Columbine High School and killed 13 people before taking their own lives. Fifteen years have passed since the tragedy, but each year people come together to remember the victims.
American institution announces finalists in yearly photography competition
Latest images from the search and rescue operation
A selection of the most striking images from around the globe this week.