admin Administrator Staff member Nov 11, 2019 12,349 453 0 Visit site Sep 8, 2020 #1 The 313-million-year-old tracks were left by a tetrapod. 313-million-year-old track marks found in Grand Canyon : Read more
The 313-million-year-old tracks were left by a tetrapod. 313-million-year-old track marks found in Grand Canyon : Read more