Walking the Trek Through Time - Mesozoic Era - on a sunny day.

Detailed Description
Photograph of the walking path of the Trek Through Time, in the woods at Reston National Center. The path is about a third of a mile long and has 15 plaques detailing the history of life on earth from 540 million years ago to today. This photo is of the about halfway through. The blue posts mark millions of years before present.
Sources/Usage
Public Domain.