Tree rings
By Fort Collins Science Center
January 2029 (approx.)
![Microscopic view of tree rings, with a scale bar of 0.5 mm](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/media/images/Dendro_1.png?itok=W96zIM1B)
Detailed Description
Microscopic view of tree rings from a ponderosa pine in northern New Mexico. Photo by Ellis Margolis (USGS).
Sources/Usage
Public Domain.