People pass a suitcase as they line up to enter a railway station in Beijing, February 15, 2015. Chinese Ministry of Transport said a total of 2.807 billion trips are expected to be made during the 40-day Spring Festival travel rush, which started on February 4 and will last until March 16, Xinhua News Agency reported. (Photo by Reuters/Stringer)

A man looks at members of the flash mob group calling themselves the «Brides of March» (“Grab a wedding dress and join the brides as we parade through the heart of San Francisco, strolling through Union Square, shopping at fancy stores and drinking at local bars!”) as they stand outside a bar March 18, 2006 in San Francisco. The flash mob group made their way through the streets stopping at bars, cafes, and several stores. (Photo by Justin Sullivan/Getty Images)

Visitors to Kensington Gardens are reflected in Anish Kapoor's sculpture “C-Curve 2007” on September 27, 2010 in London, England. (Photo by Peter Macdiarmid/Getty Images)

Beluga the bog poses as Britney Spears during the 17th annual Tompkins Square Halloween Dog Parade October 28, 2007 in New York City. The event is the largest dog Halloween party in the United States with an annual attendance of over 400 costumed dogs. (Photo by Mario Tama/Getty Images)

Fireworks illuminate the sky over downtown Seoul during the International fireworks festival 2007 at Han River on October 13, 2007 in Seoul, South Korea. The United States, Japan and South Korea have team was attending the festival. (Photo by Chung Sung-Jun/Getty Images)

Ten day old male Gorilla “Fataki” clings to his mother “Frala” during his media debut at Taronga Zoo June 4, 2003 in Sydney, Australia. Fataki was born on May 24, 2003 and was the fourth Gorilla to be born at Taronga Zoo since the opening of the Gorilla Forest in 1997. (Photo by Chris McGrath/Getty Images)

Japanese toy maker Takara Tomy's world's smallest humanoid robot “i-Sobot” is displayed during the Toy Forum 2007 on January 23, 2007 in Tokyo, Japan. The 165mm height robot is able to walk, play the drums and keep its balance. (Photo by Koichi Kamoshida/Getty Images)

Ten-year-old panda Xin Yue channels Kate Winslet in Titantic at Taihu Lake National Wetland Park in the Jiangsu Province of China.