Penguins swim in their pool during the annual stock take at London Zoo on Monday. Caring for more than 750 different species, London Zoo keepers started the New Year with the task of counting every single animal
Residents and visitors swim and sit by the banks of the Ganges river after sunrise in Varanasi, India. The Ganges river is considered sacred in the Hindu religion and is revered as a goddess
Men perform a traditional dance in the icy waters of the Tundzha River in the town of Kalofer, Bulgaria, as part of the Epiphany Day celebrations. As a tradition, an Eastern Orthodox priest throws a cross into the river and it is believed that the person who retrieves it will be healthy throughout the year, as will those who dance in the icy waters
Luka, an almost two-year-old male polar bear, swims in his new home at the zoo in Wuppertal, Germany. Born in the Netherlands, Luka has moved to Germany to be a companion for female polar bear Anori, who is the same age.
A Siberian tiger takes a swim in its outdoor enclosure at Duisburg zoo, Germany, on Tuesday
Lynne Cameron/PA Wire
Liam Tancock takes part in the men’s open 100m backstroke on the first day of the British Gas Swimming Championships at Ponds Forge sports centre, Sheffield.
A Free Syrian Army fighter dives into a swimming pool inside a house in the old city of Aleppo, Syria, on Monday
A man swims in the polluted waters of river Yamuna on Wednesday. Temperatures in New Delhi reached 43C, according to India’s meteorological department