This handout photo taken and released on August 1, 2025 by Indonesia's Geological Agency shows Mount Lewotobi Laki-Laki spewing lava and volcanic ash up to approximately 10 kilometres high during its eruption as observed from the monitoring post in East Flores, in East Nusa Tenggara province. A volcano in eastern Indonesia erupted on August 1, belching an ash tower 10 kilometres (6.2 miles) into the sky, the country's volcanology agency said, weeks after another huge eruption triggered dozens of flight cancellations to and from Bali. (Photo by Indonesia's Geological Agency/AFP Photo)

A Sudanese man walks to a United Nations displacement camp after crossing into Tunisia from Libya on March 06, 2011 in Ras Jdir, Tunisia. As fighting continues in and around the Libyan capital of Tripoli, tens of thousands of guest workers from Egypt, Tunisia, Bangladesh and other countries are fleeing to the border of Tunisia to escape the violence. The situation has turned into a humanitarian emergency as fledgling Tunisia is overwhelmed with the workers. Libyan leader Muammar Gaddafi has vowed to fight to the end. (Photo by Spencer Platt/Getty Images). RAS JDIR, TUNISIA – MARCH 06 2011

Retired teacher Geoff Ostling displays his tattooed skin at a portrait session at his home in Petersham on May 11, 2009 in Sydney, Australia. The 62-year old has pledged to donate his skin to the National Gallery in Canberra after his death. Ostling, who did not get his first tattoo until he was in his forties, is now covered in the artwork by artist eX de Merci from neck to ankle with the theme 'all the flowers of a Sydney garden'. (Photo by Lisa Maree Williams/Getty Images)

Sudanese refugees living in Tel Aviv dance as they celebrate independence from the Republic of Sudan on July 10, 2011 in Tel Aviv, Israel. Israel's Prime Minister Benjamin Netanyahu announced that Israel recognizes the Republic of South Sudan as independent state. South Sudan became a state on July 9 after it separated from the north, with its capital in Juba, following a vote for independence. The country was recognized on July 8 by the government of Sudan. (Photo by Uriel Sinai/Getty Images)

“The 1948 Summer Olympics, officially known as the Games of the XIV Olympiad, were an international multi-sport event which was held in London, United Kingdom. After a 12-year hiatus because of World War II, these were the first Summer Olympics since the 1936 Games in Berlin. The 1940 Games had been scheduled for Tokyo, and then Helsinki; the 1944 Games had been provisionally planned for London. This was the second occasion that London had hosted the Olympic Games, the city had previously been the venue in 1908”. – Wikipedia

Photo: The Olympic torch passes through Windsor on its way to Wembley, for the start of the Summer Olympics, 29th July 1948. (Photo by Ron Burton/Keystone/Getty Images)

A girl looks up at the trophy she won after competing in a child beauty pageant at Northcote Town Hall on July 30, 2011 in Melbourne, Australia. The controversial child beauty competition, kicked off today in Melbourne despite complaints and demonstrations by pageant opponents. Organised by the US-based pageant company that produces reality TV show “Toddlers and Tiaras”, Australian contestants will have the opportunity to pose with the reality show star, six year-old Eden Wood. (Photo by Scott Barbour/Getty Images)

Flowers are left at the scene of a hit and run following civil disturbances in the Winson Green area on August 11, 2011 in Birmingham, England. Police are continuing investigations after three people – reportedly trying to protect shops from rioting and looting in Dudley Road – were struck by a car. Police have so far arrested over 1,000 people following rioting which erupted over a four-day period across the UK. (Photo by Jeff J Mitchell/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)