The First U.S. Spacewalk – Gemini 4 Ed White made the United States' first spacewalk on June 3, 1965 during the Gemini 4 mission. The extra-vehicular activity (EVA) started at 19:45 UT (3:45 p.m. EDT) on the third orbit when White opened his hatch and used the hand-held manuevering oxygen-jet gun to push himself out of the capsule. (Photo by NASA)

An alligator named Muja is seen in its enclosure in Belgrade's Zoo, Serbia, August 14, 2018. Muja is officially the oldest American alligator in the world living in captivity. He was brought to Belgrade from Germany in 1937, a year after the opening of the Zoo. Muja survived three bombings of Belgrade, the Second World War and all hardships the Zoo went through. (Photo by Marko Djurica/Reuters)

Sunset on Brighton beach on February 24, 2019 in Brighton, England. (Photo by Andrew Hasson/Getty Images)

Passengers wear protective masks while riding a subway train on April 21, 2020 in Shanghai, China. Health authorities of China said the country has passed the peak of the COVID-19 epidemic on March 12. As of today, the Coronavirus (COVID-19) pandemic has spread to many countries across the world, claiming over 171,000 lives and infecting over 2.4 million people. (Photo by Yves Dean/Getty Images)

Shiite Muslims gather, albeit in fewer numbers due to the COVID-19 pandemic, at the Imam Ali shrine in the central Iraqi holy city of Najaf late on May 16, 2020, to mark Lailat al-Qadr, a night in the holy month of Ramadan during which the Koran was first revealed to the Prophet Mohammed in the seventh century. Worshippers placed copies of the Koran on their heads to convey veneration during the overnight prayers in a centuries-old ritual, as they pleaded to God to rid them of the ongoing novel coronavirus pandemic. (Photo by Haidar Hamdani/AFP Photo)

Icelandic horses play on a stud farm in Wehrheim Frankfurt, Germany, as the sun rises on Thursday, May 21, 2020. (Photo by Michael Probst/AP Photo)

The Sheep watch the sunset from the top of Cleeve Hill, Cheltenham, United Kingdom on June 22, 2020. (Photo by Jack Boskett/The Telegraph)

A showgirl in a face mask stands by the door at the reopening of Bally's Las Vegas hotel and casino, Thursday, July 23, 2020, in Las Vegas. The casino reopened for the first time since March following a closure to prevent the spread of the coronavirus. (Photo by John Locher/AP Photo)