A United Launch Alliance Delta IV heavy rocket carrying classified spy satellite cargo for the U.S. National Reconnaissance Office lifts off from Space Launch Complex 37B at the Cape Canaveral Space Force Station, Tuesday, April 9, 2024, in Cape Canaveral, Fla. This is the final flight of a Delta IV heavy rocket. (Photo by John Raoux/AP Photo)

A model wearing a creation by Luis Benitez poses during an urban shoot as part of Andalucia de Moda (Andalusia Fashion) at the aquarium of Seville, southern Spain, November 11, 2015. (Photo by Marcelo del Pozo/Reuters)

A Mark IV tank, part of the parade at the Lord Mayor's Show in London. (Photo by Topical Press Agency/Getty Images). November 1917

Luis Hernan was always curious about how wireless technologies like radio are transmitted through the air. So after finishing up his studies in architecture, computer science, and design, Hernan decided to research these invisible signals through a PhD at Newcastle University. Hernan set up a system that turned the wireless signals around him into colourful, ghostlike images using long-exposure photography, allowing people to see the strength of the signals around them. (Photo by Luis Hernan)

An American soldier walks ahead of an MKIV (Mark IV) British-made tank, circa 1918. (Photo by Hulton Archive/Getty Images)

A woman from the Tarahumara ethnic group cuts firewood with an ax while preparing for winter in Caborachi village, in Guachochi, Mexico, December 17, 2016. (Photo by Jose Luis Gonzalez/Reuters)

A woman takes a picture as a super moon, known as the Blue Moon, rises above Ciudad Juarez, Mexico on August 30, 2023. (Photo by Jose Luis Gonzalez/Reuters)

A couple chats at a park during sunset in Chihuahua November 15, 2014. (Photo by Jose Luis Gonzalez/Reuters)