Indonesian schoolchildren walk together at Sipandak Elementary School in Tiga Pancur village in Karo, North Sumatra, Indonesia, on February 19, 2018, as thick volcanic ash from Mount Sinabung volcano rises into the air following another eruption. #

An aerial view taken with a drone on February 17, 2018, shows spectators as they watch the burning of a 30-meter structure built of twigs and debris. The structure was made in the form of a Gothic-style building by Russian artist Nikolay Polissky during the celebration of Shrovetide in the village of Nikola-Lenivets, Kaluga region, some 220 kilometers (140 miles) outside Moscow. Maslenitsa is an ancient farewell ceremony to winter, traditionally celebrated in Belarus, Russia, and Ukraine, and involves the burning of a large effigy. #

Female panda Jin Bao Bao, named "Lumi" in Finnish, plays in the snow on the opening day of the Snowpanda Resort at Ahtari Zoo, in Ahtari, Finland, on February 17, 2018. #

Israeli analog astronauts start their mission on the D-MARS Project on February 18, 2018, in cooperation with the Israel Space Agency. The agency simulates life on Mars by performing several scientific experiments and staying in the D-MARS (Desert Mars Analog Ramon Station), which is built in an isolated desert area south of Mitzpe Ramon in the Israeli Negev desert, chosen for its similarities to Mars in terms of geology, aridity, and isolation. #

USA's Madeline Rooney (right) celebrates with her teammates after winning the penalty-shot shootout in the women's gold medal ice hockey match between the U.S. and Canada during the Pyeongchang 2018 Winter Olympic Games at the Gangneung Hockey Center on February 22, 2018. #

Players from Team Canada react after being defeated by Team United States by a 3-2 score in the overtime penalty-shot shootout during the women's gold medal game on day 13 of the Pyeongchang 2018 Winter Olympic Games. #

Students from nearby high schools rally at Marjory Stoneman Douglas High School after participating in a county-wide school walk out in Parkland, Florida on February 21, 2018. #

Marjory Stoneman Douglas High senior Samuel Zeif weeps after talking about how his best friend was killed during last week's mass shooting while he participates in a listening session hosted by U.S. President Donald Trump in the state dining room at the White House on February 21, 2018, in Washington, D.C. #

A worker places oranges on a sculpture of Hindu deity Ganesh made of lemons and oranges on the eve of the 85th Lemon Festival, on February 16, 2018, in Menton, southeastern France. #

A security guard stands beside a huge blue rooster, Katharina Fritsch's Hahn/Cock art installation, on the outdoor terrace of the National Gallery of Art in Washington, D.C., on February 21, 2018. #

Gold medal winners Tessa Virtue and Scott Moir of Canada celebrate during the victory ceremony for the figure skating ice dance free dance on day 11 of the Pyeongchang 2018 Winter Olympic Games. #

A United States Air Force F-15 fighter jet based at RAF Lakenheath speeds through the Dinas Pass, known in the aviation world as the Mach Loop, on February 16, 2018, in Dolgellau, Wales. The Royal Air Force and aircraft of the United States use the valleys of Snowdonia to practice low flying techniques and pilot training. The mountain peak vantage points attract aviation enthusiasts from all over the world who hope for a glimpse of their favorite military aircraft spending days waiting for the un-published and un-scheduled flybys. #

An instructor from the Ciudad Juarez Police Academy shows civilians how they process a crime scene, during the "Cadete por un Dia" ("Cadet for a Day") program in Ciudad Juarez, Chihuahua state, Mexico, on February 17, 2018. The municipal police organize the program in order to recruit new agents. #

Christopher Delbosco of Canada crashes in the freestyle skiing men's ski cross 1/8 finals on day 12 of the Pyeongchang 2018 Winter Olympic Games at Phoenix Snow Park on February 21, 2018. #

A mountain hare runs in the snow on the top plateau of a mountain in the Cairngorms, Scotland, on February 16, 2018. Wildlife groups in Scotland have recently warned the Scottish government that mountain hares potentially face local extinctions due to culls. #

Gold medalists Kikkan Randall and Jessica Diggins of the U.S. celebrate on the podium during the medals ceremony for women's cross-country skiing team sprint free in Pyeongchang, South Korea, on February 22, 2018. #

Pristina-born British singer and actress Rita Ora performs in Pristina on February 17, 2018, on the 10th anniversary of Kosovo Independence. Kosovo celebrates 10 years since it declared independence, a moment of pride for its ethnic Albanian majority, although sovereignty remains fiercely contested by Serbia. #

A performer sprays molten iron against a wall to create sparks during a traditional performance to celebrate Chinese Lunar New Year in Zhangjiakou, Hebei province, China, on February 17, 2018. #

Supporters of the late opposition strongman Morgan Tsvangirai gather under an umbrella during a rainstorm ahead of his burial in the village of Humanikwa, Buhera, Zimbabwe, on February 20, 2018. #

Revellers participate in a "flour war" during Ash Monday celebrations, a traditional festivity marking the end of Carnival season and the start of the 40-day Lent period until Orthodox Easter, in the port town of Galaxidi, Greece, on February 19, 2018. #

A forerunner jumps during the Nordic combined, Team Gundersen, LH/4x5km, ski-jumping competition round on day 13 of the Pyeongchang 2018 Winter Olympic Games on February 22, 2018. #

A SpaceX Falcon 9 rocket launched from Vandenberg Air Force Base lights up the early morning sky on February 22, 2018, as viewed from Solvang, California. The launch, seen by millions of people throughout parts of Northern and Southern California, was the result of setting sunlight hitting the contrail left behind as a Spanish Paz satellite was placed into orbit by the private space company. #

Mona Brorsson of Sweden, Lena Haecki of Switzerland, and Kaisa Makarainen of Finland compete during the women's 4x6km relay on day 13 of the Pyeongchang 2018 Winter Olympic Games at Alpensia Biathlon Center on February 22, 2018. #

Gold medal winner Anna Gasser of Austria is flanked by silver medal winner Jamie Anderson of the United States (right) and bronze medal winner Synnott Zoi Sadowski of New Zealand during the venue ceremony for the women's Big Air snowboard final at the 2018 Winter Olympics in Pyeongchang, South Korea, on February 22, 2018. #