View of a Spitfire from the cockpit of an He111,somewhere over Southern England 1941 – 2014. (Photo by Adam Surrey)

Mary McHugh mourns her slain fiance Sgt. James Regan at “Section 60” of the Arlington National Cemetery May 27, 2007. Regan, a US Army Ranger, was killed by an IED explosion in Iraq. (Photo by John Moore/Getty Images)

In this Sunday, September 18, 2016 photo, participants wait on stage ahead of Miss Trans Star International 2016 show celebrated in Barcelona, Spain. (Photo by Emilio Morenatti/AP Photo)

Eva Longoria Farmer Visits "The Tonight Show Starring Jimmy Fallon" at Rockefeller Center on November 24, 2015 in New York City. (Photo by Theo Wargo/NBC/Getty Images for "The Tonight Show Starring Jimmy Fallon")

While vacationing on the Maldives Islands, Taiwanese amateur photographer Will Ho stumbled onto an incredible stretch of beach covered in millions of bioluminescent phytoplankton. These tiny organisms glow similarly to fireflies and tend to emit light when stressed, such as when waves crash or when they are otherwise agitated. While the phenomenon and its chemical mechanisms have been known for some time, biologists have only recently began to understand the reasons behind it. Photo: Bioluminescent phytoplankton washes up on Maldives beach. (Photo by Will Ho)

In the water of the Red Sea, seventy meters off the shore of Eilat, a unique underwater attraction was created - the Red Sea Star - the only underwater restaurant and bar in the world.

For more than three years, Ukraine has been plagued by a conflict between the eastern secessionist territories and the Kiev government. Demonstrations by pro-Russian parties that oppose the current government first began in 2014 - and now, over 10,000 people have died, many of them civilians. These images portray a generation caught between war and peace. Many of them were born into the civil conflict dominating the country and are disorientated about their place in the world. Here: Youths during a party organised on a decommissioned bridge in Kiev. (Photo by Aude Osnowycz/The Guardian)

Members of rival teams fight with oranges during an annual carnival battle in the northern Italian town of Ivrea, Italy on February 11, 2018. Established in 1808, the Carnival of Ivrea is one of the oldest and most particular festivals in the world. (Photo by Alessandro Bianchi/Reuters)