A white crab spider hides between the petals of a rain spotted rose blossom in the garden of a home near Oakland in southwestern Oregon on August 23, 2024. Crab spiders are ambush predators and wait patiently for their prey to approach. (Photo by Robin Loznak/ZUMA Press Wire/Rex Features/Shutterstock)

People walk with umbrella during snowfall in Istanbul, Turkiye on November 19, 2023. (Photo by Hakan Akgun/Anadolu via Getty Images)

The Chavo del Ocho balloon makes its way along the streets during an annual Christmas parade at Santiago town in Chile, December 13, 2015. (Photo by Pablo Sanhueza/Reuters)

A dog walker on Longsands beach before sunrise in Tynemouth, UK on April 1, 2016. (Photo by Owen Humphreys/PA Wire)

A red deer stag in Bushy Park, southwest London, pulls a comical face for the camera in the second decade of November 2023. (Photo by Andrew Wood/Caters News Agency)

An adult black-rumped flameback woodpecker is pestered by a pair of hungry chicks in Rajarhat, India in the second decade of May 2024. (Photo by Kalyan Acharya/Solent News)

A rooster is seen with the Zigana Mountain Pass, an important road route connecting the Eastern Black Sea region to Eastern Anatolia at an altitude of 2,050 meters, and the surrounding high areas after effective snowfall has occurred intermittently on October 23, 2024 in Trabzon, Turkiye. (Photo by Hakan Burak Altunoz/Anadolu via 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)