The fourth annual BigPicture Natural World Photography Competition aims to celebrate the diversity of life on Earth, and encourages people to protect and conserve it. Here: “The Salmon Catchers”. Terrestrial Wildlife. To capture this view of a mother grizzly bear and her cub, photographer Peter Mather set up a camera trap on a log that he knew the bears tended to traverse while fishing for salmon, in the Yukon River watershed in Canada. (Photo by Peter Mather/BigPicture Natural World Photography Competition 2017)

Thomas Thwaites, a 34-year-old researcher from London, has spent the past year creating prosthetics that allow him to roam around on all fours like goat.

A man sits on top of a car as he is stranded on a flooded street in Tianjin, China, July 20, 2016. (Photo by Reuters/Stringer)

“As you can see I love the Icelandic Horse. Born and raised with them, I love to work with them and watch them ... they have unbelievable network of communication and energy I can´t explain with words”. – Gigja Einarsdottir. Photo: “Runners”. (Photo by Gigja Einarsdottir)

«Sing»

The story of 20 children born or living with illness or health conditions is being told by Toronto photographer and artist Shawn Van Daele, by transforming their drawings into magical photographs.

A man plays with his pet goat while taking a bath to cool off in a canal during hot and humid weather in Lahore, Pakistan May 30, 2018. (Photo by Mohsin Raza/Reuters)

In this Thursday, January 28, 2016 photo, a “child angel” doll sits on a chair in Bangkok, Thailand. The dolls, which are said to bring good luck to their owners, became a media sensation this week after a leaked memo from a Thai budget airline gave pointers on how they could be treated like passengers if they have a paid-for seat. Thai people are superstitious, and the doll phenomenon has been analyzed as a modern version of a traditional totem containing real body parts, but as a fad it seems have more in common with Furby dolls. (Photo by Sakchai Lalit/AP Photo)

A mahout bathes his elephant in the river Sabarmati on a hot summer day in Ahmedabad, India May 21, 2017. (Photo by Amit Dave/Reuters)