A robot is seen on Mount Etna, Italy on July 4, 2017. Mount Etna, in Sicily, is a test bed for the approximately three-foot high, four-wheeled machine ahead of a future mission to the moon. It is being conducted by the German Aerospace Centre, the agency which runs Germany's space programme. (Photo by Antonio Parrinello/Reuters)

British band Florence and the Machine performs at the Bilbao BBK Live festival in Bilbao, Spain, early 13 July 2018. Bilbao BBK Live festival runs from 12 July to 14 July 2018. (Photo by Miguel Tona/EPA/EFE)

A machine engraves information on an ingot of 99.99 percent pure gold at the Krastsvetmet non-ferrous metals plant, one of the world's largest producers in the precious metals industry, in the Siberian city of Krasnoyarsk, Russia October 24, 2016. (Photo by Ilya Naymushin/Reuters)

Children are engulfed by foam during the Bubble Show event in Beijing, China, Sunday, June 26, 2016. Thousands of residents enjoy colored foam churned out by machines along a running track at the event designed for children and parents' interaction. (Photo by Ng Han Guan/AP Photo)

A fan lies passed out on the first day of the Wacken Open Air heavy metal music fest on August 4, 2011 in Wacken, Germany. Approximately 75,000 heavy metal fans from all over the world have descended on the north German village of 1,800 residents for the annual three-day fest. (Photo by Sean Gallup/Getty Images)

In time for Halloween the Maniac Pumpkin Carvers, creative art studio, held the Cotton Candy Machine workshop in Brooklyn, N.Y., demonstrating techniques and tools to create intricate pumpkin art. Maniac Pumpkin Carvers, which focuses on elevating the art of pumpkin carving, were a past winner of the Food Network's Halloween Wars. Their work has been displayed at MOMA, the Whitney Museum and Yankee Stadium. Here: A Tara Bonethrower pumpkin created by the Maniac Pumpkin Carvers at Cotton Candy Machine in Brooklyn, N.Y. on October 18, 2014. (Photo by Siemond Chan/Yahoo Finance)

A dog plays amid a heavy snowfall in Madrid on January 9, 2021. Heavy snow fell across much of Spain, leaving huge areas blanketed in white as Storm Filomena brought wintry weather not seen in decades to the Iberian peninsula. (Photo by Benjamin Cremel/AFP Photo)

Seized plastic handguns which were created using 3D printing technology are displayed at Kanagawa police station in Yokohama, south of Tokyo, in this photo taken by Kyodo May 8, 2014. Yoshimoto Imura became the first man to be arrested in Japan for illegal possession of two guns he created himself using 3D printing technology, Japanese media said on Thursday. The 27-year-old, a college employee in the city of Kawasaki, was arrested after police found video online posted by Imura claiming to have produced his own guns. Gun possession is strictly regulated in Japan. Police raided Imura's home and found five guns, two of which could fire real bullets, Japanese media said. (Photo by Reuters/Kyodo)