A one-month-old wolf cub ululate as zookeeper Luo Yong plays guitar at the Chongqing Yongchuan Safari Park on March 27, 2008 in Chongqing, China. Luo has worked as a keeper in the wolf zone of the park after he graduated university. Luo has developed a special way to communicate with the wolves by trying to imitate the noises they make. He also teaches wolf cubs to ululate and some wolves will howl along when he plays guitar. (Photo by China Photos/Getty Images)

Florida Division of Forestry fire fighter, Tim Abramczyk, sprays foam on a hotspot that flared up as he works on containing a 50,316-acre brush fire on June 10, 2011 in West Dade, Florida. The fire started last weekend as South Florida continues to endure a dry start to the rainy season and drought conditions have begun to appear. The forestry division has the fire about 55 percent contained. (Photo by Joe Raedle/Getty Images)

A member of the Eton public school O.T.C. (Officers Training Corps) practising shouting out orders during a training session, 20th January 1940. (Photo by Hulton Archive/Getty Images)

In this September 16, 2017 photo, a music fan poses for the photo against an angel wings' mural at the Rock in Rio music festival in Rio de Janeiro, Brazil. (Photo by Leo Correa/AP Photo)

A kite surfer takes advantage of high winds and waves off Blackpool seafront on January 12, 2012 in Blackpool, England. Meteorologists are predicting calmer weather after high winds hit many parts of the North West today. (Photo by Christopher Furlong/Getty Images)

A vehicle is trapped in a flooded street during a rainstorm in Beijing city on June 23, 2011 in Beijing, China. Heavy rain that hit Beijing on Thursday afternoon has disrupted traffic and caused flooding low-lying areas. (Photo by ChinaFotoPress/Getty Images)

A woman walks past a damaged pagoda after an earthquake in Bagan, Myanmar August 25, 2016. Rescue workers surveyed the damage Thursday after a powerful earthquake shook Myanmar, killing at least four people and damaging 185 ancient Buddhist pagodas in the former capital of Bagan, a major tourist site. (Photo by Soe Zeya Tun/Reuters)