The Mpemba effect and Hope Probe's image of Mars - today's best pictures

Take a look at some of the best images from around the world in the past 24 hours

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  Mars, as photographed by the Hope probe after it entered orbit in the first Arab mission to the Red Planet. Mohammed bin Rashid Space Centre

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  Alter Flecken, the oldest part of Freudenberg, western Germany. The district contains 80 half-timbered houses, which survived the Second World war or were restored in the traditional style. AFP

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  Skaters on a frozen marsh pass windmills in Kinderdijk, Netherlands. EPA

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  A man sells balloons on St Valentine’s Day in Kabul, Afghanistan. AP

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  A woman throws hot water into the cold air to produce the so-called Mpemba effect at Drachenberg (Dragon's Hill) in Berlin. The effect, a paradoxical phenomenon in which hot water freezes faster than cold water under certain conditions, is named after Erasto Bartholomeo Mpemba, who discovered it as a schoolboy in Tanzania. AFP

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  Municipal employees hold a coffin containing remains of Russian and French soldiers during a burial ceremony in the western town of Vyazma. Officials and descendants of 19th century military leaders gathered for a windswept ceremony to rebury the remains of 126 people killed in one of the bloodiest battles of Napoleon’s Russian campaign. AFP

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  A Ukrainian soldier plays the accordion on the contact line with Russian-backed separatist rebels near the town of Avdiivka in Donetsk. Reuters

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  Michael van der Veen, second from left, a lawyer for former US president Donald Trump, fist-bumps a colleague on the Washington, DC subway as they leave Capitol Hill. The Senate acquitted Mr Trump after his second impeachment trial. AP

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  Demonstrators riding horses flash the three-finger salute during a protest against the military coup in Naypyidaw, Myanmar. EPA

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