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A commercial airline pilot in the UK reported seeing a mysterious disc-shaped object pass alarmingly close to a passenger aircraft while approaching London Gatwick Airport, triggering an official aviation safety investigation. The incident took place on 29 April 2026 but only came to wider public attention after the UK Airprox Board published its report.

In 2011, a team of British researchers prepared to carry out what would have been one of the first outdoor tests of solar geoengineering equipment anywhere in the world, a plan to send a helium balloon roughly 1 kilometre into the sky above a disused airfield in Norfolk, tethered to a hose that would pump around 150 litres of water up through it. The test was never meant to alter the climate itself.

In a woodland in Staffordshire, rings of pipes have been pumping extra carbon dioxide over 180-year-old oak trees every growing season since 2017, giving scientists a rare, decade-long window into how mature forests might behave in a warmer, more carbon-rich future. The facility, known as BIFoR FACE and run by the University of Birmingham, raises CO2 levels inside its treatment rings to around 573 parts per million, close to what the whole atmosphere is projected to reach by the 2050s, compared to roughly 424 parts per million in untreated control rings nearby.