Trialist Pavel Prikhodko attempts to pull an An-2 plane as a cat walks nearby during a charity event near the village of Tatarka in Stavropol Region, Russia on December 27, 2020. (Photo by Eduard Korniyenko/Reuters)

Police officers detain a Navalny supporter during a protest in St. Petersburg, Russia, Tuesday, February 2, 2021. A Moscow court has ordered Russian opposition leader Alexei Navalny to prison for more than 2 1/2 years on charges that he violated the terms of his probation while he was recuperating in Germany from nerve-agent poisoning. Navalny, who is the most prominent critic of President Vladimir Putin, had earlier denounced the proceedings as a vain attempt by the Kremlin to scare millions of Russians into submission. (Photo by Dmitri Lovetsky/AP Photo)

The Soyuz 2.1b rocket with a Fregat-M booster and meteorology and emergency communications satellite Arktika-M No 1 launches from Baikonur Cosmodrome in Baikonur, Kazakhstan on February 28, 2021. Arktika-M No 1 is the first of ten Arktika satellites to be launched by Roscosmos into orbit. (Photo by Roscomos/TASS)

A team of female cadets takes part in a tug-of-war competition at Budyonny Military Academy of the Signal Corps in St Petersburg, Russia on March 7, 2021. (Photo by Peter Kovalev/TASS/Profimedia)

Russian honour guards march during the military parade at Red Square in Moscow on November 7, 2018. Russia marks the 77th anniversary of the 1941 historical parade, when Red Army soldiers marched past the Kremlin walls towards the front line to fight Nazi Germany troops during World War Two. (Photo by Mladen Antonov/AFP Photo)

An employee walks past a rotary dredge working at an open-cast iron ore mine of the Stoilensky mining and concentration plant (GOK), owned by the Novolipetsk (NLMK) steel mill, in the city of Stary Oskol in Belgorod region, Russia, August 4, 2015. (Photo by Maxim Shemetov/Reuters)

Gold granules are displayed at the Prioksky Non-Ferrous Metals Plant in Kasimov, Russia February 14, 2017. (Photo by Sergei Karpukhin/Reuters)

Guardian of the Mangroves – Overall Winner. Tanya Houppermans, Cuba. A curious American crocodile (Crocodylus acutus) swims right up to Tanya, at Gardens of the Queen (Jardines De La Reina), an archipelago off the coast of Cuba. It has been strictly protected since 1996, and is one of the most untouched marine ecosystems in the world. ‍ “The healthy population of American crocodiles is down to the pristine condition of the mangroves and I wanted to capture close ups of this gentle giant in its natural habitat. I hope this image can illustrate that protecting areas like this is so critical”. (Photo by Tanya Griffin Houppermans/Mangrove Photographer of the Year)