People stand in front of a black ribbon, symbolising remembrance and mourning, being projected onto the Sydney Opera House on February 9, 2023 in solidarity with Turkey and Syria after a massive earthquake devastated the two countries. (Photo by David Gray/AFP 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)

In his book “Side Effects”, aerial photographer Kacper Kowalski took to the skies to paint a portrait of the complex relationship between humans and nature. From the sky, he captured where nature and civilization collide into aesthetic, abstract colors and shapes. Photo: A view over fields of grain in Spring chamomile, cornflower and other weeds growing amongst the grain sprouts. (Photo by Kacper Kowalski/Panos Pictures)

Employees work on a crane above an E-70 wind turbine manufactured by German company Enercon for La Compagnie du Vent during its installation at a wind farm in Meneslies, Picardie region, France July 31, 2014. (Photo by Benoit Tessier/Reuters)

Grand title winner: Environmental photographer of the year. The Bitter Death Of Birds by Mehdi Mohebi Pour. This photo shows the efforts of the environmental forces to collect the bodies and prevent the spread of this disease. The Miankaleh wetland is being destroyed by changes in the climate and it is my duty as a photographer to highlight these problems and create a record for history. I want to prevent the complete destruction of the wetland and the potential environmental disaster by showing the issues and threats to these beautiful natural places. (Photo by Mehdi Mohebi Pour/Environmental Photographer of the Year)

Route engineer Richard Winter stands in front of a pile of road salt at the Birchanger Depot on November 8, 2011 near Bishop's Stortford, England. (Photo by Peter Macdiarmid/Getty Images)

Wouldn’t it be wonderful if all weapons were created by Sonia Rentsch rather than by gunsmiths? In the series Harm Less, Sonia had constructed a number of firearms using various plants. Of course people might say that it’s not the guns that kill people; it’s the people that kill people. However, this statement is completely false. Can you imagine some equivalent of school shooting if the guns were not available? Yes, some crazy kid would still be able to bring a weapon to class, but most likely it would be a club or a penknife, making him easily tamable. (Photo by Sonia Rentsch)