A team of scientists claims to have discovered a new colour that humans cannot see without the help of technology. The researchers based in the United States said they were able to “experience” the colour, which they named “olo”, by firing laser pulses into their eyes using a device named after the Wizard of Oz. Olo cannot be seen with the naked eye, but the five people who...

Negotiations expected to centre on uranium enrichment begin in Oman as Trump expresses cautious optimism. Iran and the United States have opened a third round of talks in Oman aimed at curbing Tehran’s nuclear activities, with discussions expected to centre on uranium enrichment. Iranian state television confirmed the negotiations were under way in Muscat on Saturday, though neither Iran’s Foreign Minister Abbas Araghchi nor US envoy Steve Witkoff...