Scientists say they believe they have captured the elusive Higgs Boson particle that gives matter mass.
Professor John Womersley, chief executive of the Science and Technology Facilities Council, told reporters at a London briefing that they had discovered a particle consistent with the Higgs Boson.
Discovery is the important word. That is confirmed. It's a momentous day for science.
There is a strong Welsh connection to the groundbreaking scientific project as Dr Lyn Evans from Aberdare was the project leader.
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National Trust Wales has announced it's to open the new Far End Garden at the end of this month, spanning 80 acres of Snowdonian hillside.
Cardiff's tourism information centre is closing today, with the only staffed provision residing in Cardiff Bay.