Girls pose during a photocall to promote the Big Royal Wedding Sleepover at “Camp Royale” on Clapham Common on March 8, 2011 in London, England. The “Pop Up” campsite will cater for up to 10,500 people between April 28 and May 1 to coincide with the weekend of the Royal Wedding on April 29. (Photo by Dan Kitwood/Getty Images). LONDON, ENGLAND – MARCH 08 2011

A member of the Edo Firemanship Preservation Association balances on top of a bamboo ladder as he performs a ladder stunt during the New Year's fire review conducted by the Tokyo Fire Department at Tokyo Big Sight on January 6, 2009 in Tokyo, Japan. The annual event, featuring various demonstrations of the latest firefighting and emergency rescue techniques, aims to promote the prevention of fire and disaster. (Photo by Kiyoshi Ota/Getty Images)

An old locomotive train that was used for transporting coal is preserved as a monument at Ny-Alesund, in Svalbard, Norway, October 11, 2015. A Norwegian chain of islands just 1,200 km (750 miles) from the North Pole is trying to promote new technologies, tourism and scientific research in a shift from high-polluting coal mining that has been a backbone of the remote economy for decades. (Photo by Anna Filipova/Reuters)

A firefighter recovers after climbing the 1800 steps of the Costanera Centre Tower as part of the “Race for Life” aimed at encouraging organ donation in Chile, in Santiago, on October 16, 2016. More than 500 volunteer firefighters are expected to climb the 1800 steps of the tallest building in South America to promote and encourage organ donation in the country. (Photo by Claudio Reyes/AFP Photo)

For more than 2,000 years, women from the Baiga tribe in the highland district of Dindori, in central India’s Madhya Pradesh state, have been tattooed. Sumintra, 25, from Bona village, has the markings across her forehead, legs and arms. The women who work as tattoo artists are knowledgable about the different types of designs and pigments preferred by various tribes, and their meanings are passed to them by their mothers. The tattooing ‘season’ begins with the approach of winter. (Photo by Ronny Sen/WaterAid/The Guardian)

A contestant prepares backstage before the final show of the Miss International Queen 2018 transgender beauty pageant in Pattaya, Thailand March 9, 2018. Twenty-seven international contestants are participating in the annual beauty contest for transgender women which aims to promote the tourism industry in the resort city of Pattaya and create a positive image of transgender people. (Photo by Soe Zeya Tun/Reuters)

Alexandra Crockett, a musician and jewelry designer, has been present and active in the metal community since the age of 15 and is currently a doctoral student in the Bay Area. Beginning her idea for the book by doing promotional photos for bands and friends she would cat-sit for, she found an interesting dynamic between men in the metal scene and their cats. The idea for the book formed around giving accolades to local musicians and artists in the metal scene, while also bringing to light no-kill shelters and their importance for animal rights.

A group of around 400 demonstrators participate in a protest by burying their heads in the sand at Sydney's Bondi Beach November 13, 2014. Hundreds of protesters participated in the event, held ahead of Saturday's G20 summit in Brisbane, which was being promoted as a message to Australian Prime Minister Tony Abbott's government that, “You have your head in the sand on climate change”. (Photo by David Gray/Reuters)