Week in pictures: 13-19 February 2021

image copyrightAnastasia Makarycheva / Reuters

image captionA dog with blue fur in a cage awaits attention at a veterinary hospital in Nizhny Novgorod, Russia. A pack of stray dogs with blue fur was found earlier this month near an abandoned chemical plant in the city of Dzerzhinsk.

image copyrightFabrizio Villa / Getty Images

image captionLava flows down the side of Mount Etna, Europe's most active volcano. It erupted on Tuesday and again in the early hours of Thursday, sending hot lava and ash clouds into the Sicilian sky. Nearby towns are being monitored by local authorities.

image copyrightNASA

image captionA video still from footage by Nasa's Perseverance Mars rover shows the surface of the planet after touchdown in Jezero Crater. The six-wheeled vehicle will spend at least two years drilling into rocks, looking for evidence of past life. The crater is thought to have held a giant lake billions of years ago.

image copyrightMilos Bicanski / Getty Images

image captionSnow falls on the Temple of Athena Nike on the Acropolis in Athens. Temperatures as low as -19C (-2.2F) have been recorded in the north-western city of Florina. Prime Minister Kyriakos Mitsotakis has urged people to stay at home.

image copyrightVictoria Jones / PA Media

image captionYoga teacher Harriet McAtee conducts a yoga class on her 6ft (1.8m)-wide narrowboat in Oxford. The coronavirus pandemic has forced Harriet to hold her classes via Zoom video calls, reaching students as far away as New Zealand.

image copyrightCHAIDEER MAHYUDDIN/AFP

image captionAn elephant calf receives medical attention at the Saree elephant conservation centre in Sumatra's Aceh province, after being rescued from mud in Pidie district.

image copyrightPierre Crom / Getty Images

image captionIce-skating fever is gripping the Netherlands after days of sub-zero temperatures froze lakes, ponds and canals across the country, including this area of Delft. Prime Minister Mark Rutte said: "Take advantage of the good weather and the ice - but do it under Covid-19 measures."

image copyright Peter Byrne / PA Media

image captionThe body of a 61-year-old woman was found after a house collapsed in Ramsbottom, Greater Manchester, on Wednesday evening. Fire investigators said it "would not be appropriate to speculate on a probable cause" while the investigation continues.

image copyrightEamonn M. McCormack / Getty Images

image captionPolice officers stand outside the King Edward VII hospital in London, where the Duke of Edinburgh is currently receiving treatment. Prince Philip, 99, was said to be in "good spirits" after being admitted on Tuesday, feeling unwell. Buckingham Palace says his stay is not related to coronavirus and is expected to last for a few days.

image copyrightTeng Zhizhong / Getty Images

image captionA vast array of books is on display at Songpo bookstore during the Spring Festival holiday in Shaoyang, Hunan Province, China.