An elephant feeds on an old Christmas tree in their enclosure of Prague's Zoo, in the Czech Republic.

Sea lion Leo poses after writing the Chinese character for "tiger", which is the upcoming new year's Chinese zodiac sign, during a press preview at Hakkeijima Sea Paradise in Yokohama, Japan.

A woman throws hot water from a thermos bottle into the cold air making its three phases visible - liquid, gas, solid - as the smallest droplets cool and evaporate in a dramatic cloud before they reach the ground as snow, in Berlin on a sunny but frosty Boxing Day.

A negative SARS-CoV-2 rapid antigen test used to detect the Covid-19 coronavirus hangs on a Christmas tree in Lausanne, Switzerland..

People walk along La Rambla in downtown Barcelona, Spain. Spain is reporting almost 700 cases per 100,000 inhabitants over 14 days, more than double the accumulated cases before last year's Christmas holidays. The omicron strain has soared from 5% of new cases in Spain to 47% within one week.

This aerial photograph shows the erupting Piton de la Fournaise volcano on the French Indian Ocean island of Reunion.

Supporters of the Trinamool Congress (TMC) celebrate the party's victory in the Kolkata Municipal Corporation (KMC) elections, in Kolkata, India.

Aquarist Volmer Salvador swims inside a tank at the AquaRio aquarium dressed in a Santa Claus costume during the Christmas season in Rio de Janeiro, Brazil.

Fallen electric pylons block a road in Surigao City, Surigao del norte province, days after super Typhoon Rai devastated the city.

A rescuer helps a girl as they go through flooding caused by Typhoon Rai in Cagayan de Oro City, southern Philippines, in this image provided by the Philippine Coast Guard.

Barcelona soccer player Sergio Aguero cries during a press conference, after announcing his retirement from football due to a heart condition, at the Camp Nou stadium in Barcelona, Spain.

A woman walks past a light arch set up for the upcoming New Year and Christmas holidays in front of snow-covered trees after heavy snowfall in Moscow, Russia.

A man talks on the phone while walking in an empty street in the financial district, known as The City, in London. Many people will re-start working from home as the British government warns the rapid spread of omicron "adds additional and rapidly increasing risk to the public and health care services."

In this aerial photo, destruction from a recent tornado is seen in downtown Mayfield, Kentucky. Governor Andy Beshear is warning the state’s death toll from an outbreak of tornadoes could top 100.

President Joe Biden speaks from the South Court Auditorium on the White House complex in Washington, for the opening of the Democracy Summit, as Secretary of State Antony Blinken, right, looks on.