Yew trees are ancient friends

There are a handful that are reckoned to be 700 to 800 years old, but that’s not really ancient for a tree with a life-expectancy in millennia rather than centuries.
But the age of most yew trees tends to be based on educated guesses rather than scientific data. When they’re ancient they are invariably hollow, which makes it impossible to extract cores from them and count the annual rings. Anyway, to my knowledge very few cores have been taken from living Irish trees.