Dr Lyn Evans has spoken of his pride that Wales was involved in the discovery of what's believed to be the Higgs Boson particle.
Dr Evans from Aberdare was the project leader for research into Higgs Boson, which gives matter mass and and holds the physical fabric of the universe together.
Scientists have been looking for the Higgs since the 1960s, but the search began in earnest more than 20 years ago with early experiments at Cern in Europe and Fermilab in the US.
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The last confirmed sighting of the 14-year-old was in Flint on Friday morning.
After a mostly dry evening with a few scattered showers, cloud and outbreaks of showery rain will spread northeast through the night.
Tributes have been paid to former Wales international Mel Charles, who has died at the age of 81.