New research puts age of universe at 26.7 billion years, nearly twice as old as previously believed::Our universe could be twice as old as current estimates, according to a new study that challenges the dominant cosmological model and sheds new light on the so-called “impossible early galaxy problem.”
I don’t know if this counts as a constant, but I read that time moved something like 5 times slower in the early years of the universe.
It didn’t as time is relative just like space. There is no absolute standard of time to say “time moves faster”. Faster relative to what?