I remember a scientist saying: “We’re estimating age, not determining it.”
Well, based on the Hubble Constant, the age of the universe used to be estimated at a value of 13.7 billion years. There has been a lot of restlessness these day though due to new calculations revealing the possibility that the expansion rate may be different in different parts of the universe, or it may be different altogether, or the universe is not as isotropic as it seems.
As a result, there are voices claiming that the universe is a billion or two younger than the initial estimations. But we already know that 85% of the what the universe consists of cannot be accounted for by science right now.
Here’s a positive twist of this story: if there is a re-calculation of the age of the entire universe, all the other ages should be re-calculated accordingly and we’ll end up with the people around us being way younger than we thought.