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)

Agricultural workers are rice-transplanting at the Namsa Co-op Farm of Rangnang District in Pyongyang, DPRK, on Tuesday, May 25, 2021. (Photo by Jon Chol Jin/AP Photo)

South African artist Tyla performs onstage during the MTV EMAs 2024 held at Co-op Live on November 10, 2024 in Manchester, England. (Photo by Jeff Kravitz/FilmMagic)

A team of female cadets takes part in a tug-of-war competition at Budyonny Military Academy of the Signal Corps in St Petersburg, Russia on March 7, 2021. (Photo by Peter Kovalev/TASS/Profimedia)

Vietnamese female commissioned officers of the signal force march during a parade marking their 70th National Day at Ba Dinh square in Hanoi, Vietnam September 2, 2015. (Photo by Reuters/Kham)

Suzuki's Hanare concept car is displayed during the Tokyo Motor Show, in Tokyo, Japan on October 23, 2019. The 46th Tokyo Motor Show will be op​en​ to the general public from 25 October to 04 November 2019. (Photo by Soe Zeya Tun/Reuters)

Filipinos wade through floodwaters along a road in Manila, Philippines, 22 August 2025. The National Disaster Risk Reduction and Management Council (NDRRMC) on 22 August raised its alert level and warned residents of flooding in low-lying areas and landslides in mountainous communities brought by a storm. The government weather bureau said a Tropical Cyclone Wind Signal Number 01 is raised over 17 areas due to Tropical Depression “Isang”, which made landfall over the Aurora province. (Photo by Francis R. Malasig/EPA)