In this handout photo provided by the Helmholtz Center for Research on Infectious Diseases an EHEC bacteria is visible on May 30, 2011 in Berlin, Germany. German health authorities have attributed at least 14 deaths within the last two weeks to an outbreak of enterohemorrhagic E. coli, also known as the EHEC bacteria. (Photo Courtesay Manfred Rohde, Helmholtz-Zentrum fuer Infektionsforschung (HZI)/Getty Images)

Actress Kaley Cuoco arrives to the 19th Annual 'A Night at Sardi's' benefitting the Alzheimer's Association on March 16, 2011 in Beverly Hills, California.

A moon appears behind a windmill a day before the supermoon is full on September 8, 2014 in Consuegra, in Toledo province, Spain. Consuegra belongs to a region made famous by the novel “Don Quijote de la Mancha” (Don Quixote) writed by Miguel De Cervantes. Some of the windmills belong to the 16th century. (Photo by Pablo Blazquez Dominguez/Getty Images)

(Top L-R) Playboy Playmates Anna Sophia Berglund, Kayla Rae Reid, Dominique Jane, Heather Rae Young, Alexandra Tyler, Val Keil, (bottom L-R) Audrey Aleen Allen, Ashley Doris, Hiromi Oshima, and Shanice Jordyn attend the Playboy Midsummer Night's Dream party at the Marquee Nightclub at The Cosmopolitan of Las Vegas on August 27, 2016 in Las Vegas, Nevada. (Photo by David Becker/Getty Images for Playboy Enterprises)

These photos and video were taken in the Russian city of Astrakhan on the evening of June 7th, 2012. (Photo by Maxim Korotshenko)

Global wildlife populations will decline by 67% by 2020 unless urgent action is taken to reduce human impact on species and ecosystems, warns the biennial Living Planet Index report from WWF (World Wide Fund for Nature) and ZSL (Zoological Society of London). From elephants to eels, here are some of the wildlife populations most affected by human activity. Here: The maned wolf is among the large mammals in the Brazilian Cerrado that are threatened by the increasing conversion of grasslands into farmland for grazing and growing crops. (Photo by Ben Cranke/Nature Picture Library/Alamy Stock Photo)

In this photo taken Wednesday, March 8, 2017, a woman herder sits with her goats in a remote desert area near Bandar Beyla in Somalia's semiautonomous northeastern state of Puntland. Somalia has declared the drought a national disaster, part of what the United Nations calls the largest humanitarian crisis since the world body was founded in 1945, and with animals being central to many the drought threatens their main sources of nutrition and survival. (Photo by Ben Curtis/AP Photo)

Thomas Thwaites, a 34-year-old researcher from London, has spent the past year creating prosthetics that allow him to roam around on all fours like goat.