The CBRE Urban Photographer of the Year competition – now in its ninth year – encourages professional and amateur photographers to capture cities at work. Here: Dog Walker – 15:00. The competition allows photographers to enter up to 24 images, one representing each hour of the day. (Photo by Johanna Siegmann)

“In beard and hat”; Udine, Friuli-Venezia Giulia, Italy, 2013. (Photo by Giulio Magnifico)

“Jim Fiscus is an American photographer specializing in editorial and advertising photography, including several highly regarded campaigns for the Showtime series Dexter, starring Michael C. Hall. Fiscus, who is based in Athens, Georgia, has won many awards for his work, including at the 2005 International Photo Awards for his portraits of hip-hop and R&B artists Jay-Z, Usher, and Outkast. Also in 2005, he was named International Photographer of the Year at the Lucies, and he is the winner of the 2008 International Aperture Award for his photograph of English chef and best-selling cookbook author Jamie Oliver, commissioned by Channel 4 in the U.K. In 2009, his photographic novella, “The Unfortunate Moment of Misunderstanding”, was displayed at Industrial Color’s M Project Gallery in New York in June 2009”. – Wikipedia

“When We're Gone... Memories Of Us Are All That Remain”, 2011. (Photo by: Trini61; Source: Flickr)

“Sperm whale opening it's huge mouth, Ogasawara Islands, Japan. Sperm whales are the biggest carnivorous animals on the planet. Each teeth in the mouth of adult specimen weights more than 1 kilogram. Interestingly enough that modern marine biologists believe that these teeth despite being fearsome play little role in capturing and eating giant squid – with their main function being mainly ritual aggression between males!”. (Photo by Alexander Safonov)