Police officers detain an opposition protester during a May Day rally in Saint Petersburg, Russia on May 1, 2019. Labor Day or May Day is observed all over the world on the first day of the month of May to celebrate the economic and social achievements of workers and fight for laborers rights. (Photo by Igor Russak/Reuters)

A four-week old southern three-banded armadillo (Tolypeutes matacus) is rolled up into a ball next to its mother in the tropical house of Budapest Zoo in Budapest, Hungary on May 3, 2019. The South American insect-eating mammal and its close relative, the Brasilian three-banded armadillo (Tolypeutes tricinctus) are the only two species of armadillos capable of rolling into a complete ball to defend themselves when feeling threatened. (Photo by Attila Kovács/EPA/EFE)

Participants play in the mud as they plant rice samplings during National Paddy Day, also called Asar Pandra, that marks the commencement of rice crop planting in paddy fields as monsoon season arrives, in Dhading, Nepal, June 30, 2019. (Photo by Navesh Chitrakar/Reuters)

Female seal “Lotte” swims in a pool of her enclosure at the zoo in Rostock, northeastern Germany, on September 27, 2019. (Photo by Bernd Wuestneck/dpa/AFP Photo)

Riot police help an injured anti-government protester after scuffles broke out with women police officers on a road leading to the parliament building, during a protest in Beirut on November 19, 2019. Thousands of protesters rallying against the Lebanese political elite blocked roads in central Beirut on Tuesday, preventing lawmakers from reaching the parliament and forcing the postponement of a legislative session. (Photo by Bilal Hussein/AP Photo)

The northern lights, or aurora borealis, appear in the sky over the Bamburgh lighthouse at Stag Rock in Northumberland, England on September 28, 2016. (Photo by Owen Humphreys/PA Wire via ZUMA Press)

A Lebanese man is reflected in a pool of dirty water as he casts his fishing pole from a rocky coastal area along the Beirut coastline, Lebanon, Monday, October 3, 2016. (Photo by Hassan Ammar/AP Photo)

Dan Copeland, left, and Alex Morneau of Biddeford, Maine, former high school cheerleaders, perform back flips while enjoying the record breaking heat, Thursday, May 18, 2017, at Old Orchard Beach, Maine. The temperature climbed well into the 90s in many locations throughout the state. (Photo by Robert F. Bukaty/AP Photo)