Beryl Lipton, left, douses Matt Lee during the ice bucket challenge at Boston's Copley Square, Thursday, August 7, 2014 to raise funds and awareness for ALS. The idea is: pay up for charity or get doused. The fund-raising phenomenon is catching on fast, propelled by popular videos of the dunkers and the dunked – including famous athletes and entertainers – posted on social media sites. And the challenges are raising tens of thousands of dollars and immeasurable awareness for causes from ALS to breast cancer to a camp for kids who've lost a father to war. (Photo by Elise Amendola/AP Photo)

A Nepalese Hindu woman receives TIKA on her forehead while praying to Lord Shiva during the first day of the Sarwan Brata festival, which is observed through prayer and a month of fasting, at the Pashupati Temple in Kathmandu, Nepal, 17 July 2023. (Photo by Narendra Shrestha/EPA)

Performers wearing 19th century French military uniforms fire their weapons as they attack Allied forces during a reenactment of the Battle of the Nations, in a field in the village of Markkleeberg near Leipzig October 20, 2013. The east German city of Leipzig commemorated the 200th anniversary of the largest battle of the Napoleonic Wars on Sunday by reenacting the Battle of the Nations, with 6,000 military-historic association enthusiasts from all over Europe. The decisive encounter in which tens of thousands of soldiers were killed, took place from October 17-19, 1813, just outside of Leipzig. At the height of the hostilities Napoleon fielded more than 200,000 men against an Allied force of some 360,000 soldiers which included troops from Russia, Austria, Prussia and Sweden. (Photo by Fabrizio Bensch/Reuters)

Pantless people stand on a subway platform on January 13, 2013 in New York City. Thousands of people participated in the 12th annual No Pants Subway Ride, organized by New York City prank collective Improv Everywhere. During the afternoon winter event, participants boarded separate subway stops and removed their pants, pretending that they did not know each other. The event, refered to as a “celebration of silliness” is designed to make fellow subway riders laugh and smile. (Photo by Timothy A. Clary/AFP Photo)

Yves “Jetman”, Rossy made his first public performance in the United States on Tuesday during the afternoon air show at EAA AirVenture. As thousands of spectators leaned back and clicked cameras, Rossy jumped out of a helicopter with his 6-foot carbon fiber wing armed with four 45-pound-thrust JetCat engines strapped to his back. Photo: Jetman during a trial flight from Fond du Lac airport on Monday July 29, 2013. (Photo by Mike Shore/Courtesy of Breitling)

An Indian Hindu widow smeared with colors sits and watches others playing during Holi celebrations at the Gopinath temple, 180 kilometres (112 miles) south-east of New Delhi, India Monday, March 21, 2016. A few years ago this joyful celebration was forbidden for Hindu widows. Like hundreds of thousands of observant Hindu women they would have been expected to live out their days in quiet worship, dressed only in white, their very presence being considered inauspicious for all religious festivities. (Photo by Manish Swarup/AP Photo)

A new book published by the UK Natural History Museum showcases some of the most memorable underwater photographs taken over the last few decades in its annual wildlife photographer of the year competition. Here: Giant gathering by Tony Wu. “The first indication that something extraordinary was going on were the blows, huge numbers of them – the exhalations of huge numbers of whales. Entering the water, the photographer witnessed an extraordinary scene”. (Photo by Tony Wu/Unforgettable Underwater Photography/NHM)

Costumed dancers parade on the first day of the annual Qoyllur Rit'i festival on May 27, 2018 in Ocongate, Peru. Every year, since 1783 in the Sinakara Valley at the foot of Mt Ausagante, the Qoyllur Rit'i, or “Snow and Star” festival draws tens of thousands of pilgrims from across the Peruvian Andes and beyond to what is the biggest religious gathering of its kind. Since 1780 the event merged into a mosaic of indigenous, pagan and Catholic worship when an image of Jesus appeared on a boulder after the death of a young shepherd. (Photo by Dan Kitwood/Getty Images)