People visit the autonomous urban concept car Renault EZ-GO during the first press day of the Geneva International Motor Show on March 6, 2018 in Geneva. The show opens to the public on March 8 and runs through March 18. (Photo by Fabrice Coffrini/AFP Photo)

A British Museum representative poses for photographs next to Andy Warhol's “Mao”, left, and Jim Dine's “Drag: Johnson and Mao” which feature in “The American Dream: pop to the present” exhibition during a media photocall at the British Museum in London, Monday, March 6, 2017. The exhibition, which opens to the public from March 9 and runs until June 18, charts modern and contemporary print making. (Photo by Matt Dunham/AP Photo)

Participants with the word “Harta” on their bodies, link arms as they mark International Women's Day at Avenida 18 de Julio in downtown Montevideo, Uruguay March 8, 2021. The word is a term to say exhausted or “had enough” but used by women. (Photo by Mariana Greif/Reuters)

The UK Love Island star Tasha Ghouri stunned in a white see-through dress in the second decade of August 2023. Tasha celebrated her birthday in style. (Photo by Instagram)

A cheerleader for the Virginia Cavaliers men’s basketball team on court during a timeout against the Texas A&M Aggies at John Paul Jones Arena in Virginia, US on November 29, 2023. (Photo by Geoff Burke/USA Today Sports)

American actress Aubrey Plaza (L) dances with American actress and model Madelyn Cline while sipping Avaline sparkling at Stella McCartney and Baz Luhrmann's Met Gala after party with Casamigos Tequila in Manhattan, New York on May 1, 2023. (Photo by Matteo Prandoni/BFA.com)

President Barack Obama watches as Joey Hudy (L), 14, from Phoenix, Arizona pumps the Extreme Marshmallow Cannon he invented, while touring student science fair projects on exhibit in the State Dining Room at the White House February 7, 2012 in Washington, DC. Obama hosted the second White House Science Fair celebrating the student winners of science, technology, engineering and math (STEM) competitions from across the country. (Photo by Molly Riley-Pool/Getty Images)

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)