A prototype Rollkers transportation device is displayed during a press event at the Mandalay Bay Convention Center for the 2015 International CES on January 4, 2015 in Las Vegas, Nevada. The product is not a skate; it balances for you and when you place it on the bottom of your shoe, it gives you the ability for faster transportation based on walking. The balance CES, the world's largest annual consumer technology trade show, runs from January 6-9 and is expected to feature 3,600 exhibitors showing off their latest products and services to about 150,000 attendees. (Photo by Ethan Miller/Getty Images)

A devotee holds incense sticks while celebrating the Sindoor Jatra Festival on April 15, 2015 in Thimi, Nepal. Sindoor Jatra Festival is celebrated each year in Thimi, on the outskirts of Kathmandu, to welcome the Nepali New Year and celebrate the coming of spring. During the Festival, devotees are smeared with vermillion powder and 30 chariots containing the images of several gods and goddesses are carrying by the devotees around the town, while others sing, dance and play musical instruments. (Photo by Omar Havana/Getty Images)

Model and new Victoria's Secret Angel Taylor Hill from Illinois (L) and model Megan Puleri from Ohio (R) walk the runway while singer Selena Gomez performs during the 2015 Victoria's Secret Fashion Show at Lexington Avenue Armory on November 10, 2015 in New York City. (Photo by Dimitrios Kambouris/Getty Images for Victoria's Secret)

Pete McLeod of Canada flies in formation with Nigel Lamb of Great Britain, Martin Sonka of the Czech Republic and Kirby Chambliss of the United States during a Recon flight prior to the seventh stage of the Red Bull Air Race World Championship over the Hoover Dam on October 09, 2014 on the border between the U.S. states of Arizona and Nevada. (Photo by Joerg Mitter/Red Bull via Getty Images)

Typhoon Haiyan survivor Mariena Delacueva stands amongst the ruins of her families home on November 6, 2014 in San Antonio, Samar, Philippines. Mariena's looks after the property after her parents moved to Manila to find work so they can save enough money to rebuild the house. Residents of Leyte and surrounds are preparing for the 1-year anniversary since Super Typhoon Yolanda struck the coast on November 8, 2013, leaving more than 6000 dead and many more homeless. (Photo by Chris McGrath/Getty Images)

In this handout image provided by Taronga Zoo, an unnamed baby Goodfellows Tree Kangaroo joey is seen in it's mothers pouch on March 10, 2014 in Sydney, Australia. Taronga Zoo is celebrating the successful birth of its first Goodfellows Tree Kangaroo joey in more than 20 years. Zookeepers have only just begun seeing her peeking out from first-time mother, Qwikilas, pouch after she was born in September last year. (Photo by Taronga Zoo via Getty Images)

A model performs on the Toyota FV2 concept car during the 2014 Beijing International Automotive Exhibition at China International Exhibition Center on April 21, 2014 in Beijing, China. More than 2,000 automotive enterprises from 14 countries and regions participated in the 2014 Beijing International Automotive Exhibition from April 20 to April 29. (Photo by Feng Li/Getty Images)

Yasothon resident look on as huge, handmade rockets are launched into the air during the Bun Bang Fai festival on May 11, 2014 in Yasothon, Thailand. During the Bun Bang Fai rocket festival, Thai residents launch enormous home-made rockets into the air to gain Buddhist merit and to celebrate the beginning of the rainy season. (Photo by Taylor Weidman/Getty Images)