Field Notes: Rings of Time

Field Notes: Rings of Time

From WXPR Field Notes by WXPR Public Radio

November 11, 2025 · 4 min

About this episode

This episode explores how various species, including trees and local mammals, can be aged by their growth rings.

Many people are aware that trees can be dated by counting the layers of tree rings in a cross section. But, less folks know that fish, snails, mussels, and the teeth of many local mammal species build seasonal growth rings that are used to age individuals.

Topics covered

  • tree rings
  • aging species
  • growth rings
  • natural science
  • ecology

Keywords

  • tree rings
  • fish
  • snails
  • mussels
  • mammal teeth
  • seasonal growth

Mentioned in this episode

Organizations: WXPR Public Radio

Places: local

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