An employee at Christie's auction house examines a complete sub-fossilised elephant bird egg on March 27, 2013 in London, England. The elephant bird egg is expected to fetch 30,000 GBP when it features in Christie's “Travel, Science and Natural History” sale, which is to be held on April 24, 2013 in London. (Photo by Oli Scarff)

A fighting bull loses its balance during the third day of the San Fermin running-of-the-bulls on July 8, 2011 in Pamplona, Spain. Pamplona's famous Fiesta de San Fermin, which involves the running of the bulls through the historic heart of Pamplona for eight days starting July 7th, was made famous by the 1926 novel of U.S. writer Ernest Hemmingway called “The Sun Also Rises”. (Photo by Denis Doyle/Getty Images)

“Boom, a three-year-old Staffordshire Bull Terrier, who loves birds and rabbits. He has already acquired a legion of fans on his Facebook page, and who can blame them? He might actually be the cutest pup we've ever laid eyes on (and his little buddies seem to agree). Check out these pics and see if you don't fall in love!” (Photo by Boom)

A group of San Bushmen from the Khomani San community practice their hunter-gatherer craft in the Southern Kalahari desert on October 15, 2009 in the Kalahari, South Africa. One of the largest studies of African genetics by an international team from the University of Pennsylvania, published in April 2009, revealed that the San of Southern Africa are the most genetically diverse on earth, and that the San homeland could be the spot where modern humanity began. (Photo by Dan Kitwood/Getty Images)

General view of “Marie Claire” Magazine Film Exhibition at Oquendo street during 59th San Sebastian Film Festival on September 22, 2011 in San Sebastian, Spain. (Photo by Carlos Alvarez/Getty Images)

A cosplayer dressed as Domino attends 2019 Comic-Con International on July 20, 2019 in San Diego, California. (Photo by Quinn P. Smith/Getty Images)

A penitent flagellates himself during a Holy Week procession on April 21, 2011 in San Vicente de la Sonsierra, Spain. The penitents called Los Picaos flagellate themselves during the Holy Week processions. (Photo by Denis Doyle/Getty Images)

Kalei Ferrin,3, holds a sign up in support of gay rights during the San Diego gay pride parade July 16, 2011 in San Diego, California. About 200 active-duty troops and veterans from every branch of the military participated for the first time in the march as the ban on the government policy on homosexuals serving in armed forces, or “Don't ask Don't Tell”, remains in flux in the justice system. (Photo by Sandy Huffaker/Getty Images)