A gold prospector is detained by agents of Brazil’s environmental agency on the Uraricoera River during an operation against illegal gold mining on indigenous land, in the heart of the Amazon rainforest, in Roraima state, Brazil April 15, 2016. At over 9.5 million hectares, the Yanomami territory is twice the size of Switzerland and home to around 27,000 indians. The land has legally belonged to the Yanomami since 1992, but illegal miners continue to plague the area, sawing down trees and poisoning rivers with mercury in their lust for gold. (Photo by Bruno Kelly/Reuters)

A marine rescue worker from Sea World works in a joint attempt with his colleagues to help a juvenile humpback whale stranded at Palm Beach on the Gold Coast, in Queensland July 9, 2014. (Photo by Jason O'Brien/Reuters)

A truffle is seen on a table in Alba, north-western Italy November 11, 2013. Located in the heart of the Langhe – the hilly southern area of Italy's northwestern Piedmont region – Alba is the country's capital of white truffles, a variety of the prized fungus which grows underground. Truffles are found two to eight inches (5-20cm) below the ground near the roots of trees. They give off an odour which lasts for a limited period of time and can be detected with the assistance of well-trained dogs and experienced hunters. Output of white truffles, which are not cultivated and only grow naturally in forests, has fallen in Italy over the past few years, largely because climate change has brought a damaging mix of drought and torrential rains. (Photo by Stefano Rellandini/Reuters)

Chelsea Hughes, 25, sings at the first annual Underwear Karaoke, an event that pairs two common fears: being seen in your underwear and singing in public, in Los Angeles, California March 12, 2015. (Photo by Lucy Nicholson/Reuters)

A relic hunter dubbed “Indiana Bones” has lifted the lid on a macabre collection of 400-year-old jewel-encrusted skeletons unearthed in churches across Europe. Art historian Paul Koudounaris has hunted down and photographed dozens of gruesome skeletons in some of the world's most secretive religious establishments. Photo: Albertus in the church of St George in Burgrain, Germany. Incredibly, some of the skeletons, which took up to five years to decorate, were even found hidden away in lock-ups and containers. (Photo by Paul Koudounaris/BNPS)

A professional bull rider participates in a bull riding exhibition at the premiere of “The Longest Ride” at the TCL Chinese Theatre on Monday, April 6, 2015, in Los Angeles. (Photo by Chris Pizzello/Invision/AP Photo)

An African Penguin holds a Valentine's Day card at the California Academy of Sciences on February 13, 2013 in San Francisco, California. In honor of Valentine's Day, the colony of African Penguins at the California Academy of Sciences received heart-shaped red valentines with hand written messages from Academy visitors. (Photo by Justin Sullivan)