A restaurant worker wearing a mask cleans the windows as the restaurant reopens amid the COVID-19 pandemic in Sao Paulo, Brazil, Monday, July 6, 2020. Bars, restaurants and beauty salons were allowed to re-open Monday after over three months of quarantine, and are required to observe preventative measures and reduced operating hours only during the day. (Photo by Andre Penner/AP Photo)

“NASA's Pathfinder, Pathfinder Plus, Centurion and Helios Prototype were an evolutionary series of solar- and fuel-cell-system-powered unmanned aerial vehicles. AeroVironment, Inc. developed the vehicles under NASA's Environmental Research Aircraft and Sensor Technology (ERAST) program. They were built to develop the technologies that would allow long-term, high-altitude aircraft to serve as “atmospheric satellites”, to perform atmospheric research tasks as well as serve as communications platforms”. – Wikipedia

Photo: The solar-electric Helios Prototype flying wing is flies over the Hawaiian islands of Niihau and Lehua during the first solar-powered test flight July 14, 2001 from the U.S. Navy's Pacific Missile Range Facility on Kauai, HI. The 18-hour flight was a functional checkout of the aircraft's systems and performance in preparation for an attempt to reach sustained flight at 100,000 feet altitude later in the summer. (Photo Courtesy of NASA/Getty Images)

A model presents a creation by a Mexican designer during a catwalk show promoting diversity and inclusion to foster acceptance and removal of barriers that disabled people face in the country, in Mexico City, Mexico on October 26, 2022. (Photo by Quetzalli Nicte-Ha/Reuters)

People ride a minibus illuminated with green colorful lights at a street in preparation for celebrations of the birthday of the prophet Muhammad, in Sana'a, Yemen, 04 October 2022. Mawlid is annually celebrated by many Muslim countries on the 12th day of Rabi al-Awwal (the third month of the Islamic calendar), marking the birthday of the prophet Muhammad, which is expected to be marked on 08 October 2022. In Yemen, it is celebrated by illuminating buildings and streets with green colorful lights and decorating vehicles in green. (Photo by Yahya Arhab/EPA/EFE)

The Screamin' Sasquatch jet powered Waco Biplane sits on display during media day for the Canadian International Air Show at Billy Bishop Airport, Toronto, Ontario, September 4, 2015. (Photo by Louis Nastro/Reuters)

Visitors photograph an animatronic Tyrannosaurus Rex at the National Museum of Scotland, July 29, 2011. (Photo by David Moir/Reuters)

Rick Sorenson, owner of the Rio Ramaza Marina, wades in the Sacramento River after securing an old paddlewheel boat on his property as the river makes its way up the levee on Garden Highway in Sacramento, Calif., Monday, January 9, 2017. (Photo by Hector Amezcua/The Sacramento Bee via AP Photo)

A drone photo shows fall folaige wih tones of yellow, red and brown colors of Uludag Mountain, one of the most significant winter tourism destination of Turkey, on November 29, 2020 in Bursa, Turkey. (Photo by Sergen Sezgin/Anadolu Agency via Getty Images)