A photographer could bear-ly believe his eyes when a bear started waving at him. The friendly animal wandered to the front of his enclosure before sitting back in full view of zoo guests. He then lifts his powerful paw and excitedly waves in an almost human-like way at his new audience. The hilarious encounter was captured by keen photographer Andrey Slepnev, 31, while on a trip to Madrid Zoo, Spain on March 24, 2016. (Photo by Andrey Slepnev/Caters News)

A photographer is using a unique method to show the shift from day to night across famous cities in spectacular images. Daniel Marker-Moors' take on time-lapse photography – which he calls time slice – sees the photographer snap image after image, before combining them to create beautiful, vibrant works. His images usually focus on a point in the day with the most dramatic change in light, such as sunrise or sunset. Marker-Moors, from Los Angeles, begins by shooting hundreds and sometimes thousands of images from the same spot. Here: Chicago – 35 photographs, 15 minutes. (Photo by Daniel Marker-Moors/Caters News)

Neil Zeller's snaps were taken across Canada, where he photographs the northern lights dancing across a dark night sky. In one stunning shot, Zeller, 42, even manages to capture a flash of lightning beneath a storm cell while an aurora gives off a magnificent green glow. The photographer, from Calgary, Alberta, describes himself as a night person, and became interested in night photography about 10 years ago. (Photo by Neil Zeller/Caters News)

In this Wednesday, July 23, 2014 file photo, Omaha photographer Lane Hickenbottom photographs the night sky in a pasture near Callaway, Neb. With no moon in the sky, the Milky Way was visible to the naked eye. More than one-third of the world’s population can no longer see the Milky Way because of man-made lights, according to a scientific paper by Light Pollution Science and Technology Institute's Fabio Falchi and his team members, published on Friday, June 10, 2016. (Photo by Travis Heying/The Wichita Eagle via AP Photo)

Photographer Emily Dryden and sculptor/actor Zahydé Pietri combine theatricality and organic produce to compose the photographs for their series Fresh Faces. The portraits are made from a wide range of fruit and vegetables and aim to highlight humanity’s diversity – Pietri is from Puerto Rico and Dryden is from New York. Each face has its own name and identity: “We have stories for them, which you can see in the expressions”, says Dryden, “but we decided to keep them to ourselves. We didn’t want to spoil that”. (Photo by Emily Dryden and Zahydé Pietri/The Guardian)

These portraits reveal the incredibly humanlike expressions of a variety of apes.Through piercing eyes and finite facial details, the intimate photographs show the animals looking angry, sad, delighted and pensive. They are the works of Manuela Kulpa – an IT consultant and keen photographer from near Cologne, Germany – who shot the apes predominantly at zoos across Austria, Belgium, the Czech Republic, Germany and the Netherlands. Here: Bonobo, Azibo. (Photo by Manuela Kulpa/Caters News)

Photographer Lucy Ray says she has been scratched by the pooches who are diving underwater to try and catch a tennis ball. Their wide-eyed desperation has been captured by a specialist underwater photographer who admits she has been bitten and scratched by the pooches who only had eyes for the ball. Lucy Ray, 34, said: “A dog could have the cutest face on land but as soon as they get in the water they can be terrifying. Their eyes bulge and teeth shoot out of their mouth just like an alien as they try to catch the ball”. (Photo by Lucy Ray)

Reuters Photographer Carlos Barria photographed a person born in each year China's one child policy has been in existence; from a man born in 1979, to a baby born in 2014, and asked them if they would have like to have siblings. Here: Lv Mengmeng, who was born in 1995, poses for a photograph in Shanghai August 22, 2014. When asked if she would like siblings, Mengmeng said: “Maybe brothers, because I think they could protect me”. (Photo by Carlos Barria/Reuters)