Trees cycle through death

Dendrochronologist estimates range from 80,000 to 1 million years.The problem is, there’s no simple way to gauge Pando’s age.Counting the rings of a single trunk will only account for up to 200 years or so,as Pando is in a constant cycle of growth,
death, and renewal.On average, each individual tree lives 130 years,before falling and being replaced by new ones.Second: location.During the last ice age, which ended about 12,000 years ago,glaciers covered much of the North American climatefriendly to aspens.