The planet's trees have seen plenty of history pass by their trunks. In fact, they began to populate Earth 385 million years ago, toward the end of the Devonian period. Considered living historical ...

I'm a little bit late in uploading this, but while I was up in Michigan I was able to take a trip to find some of the famous Petoskey Stones! These are Devonian age Hexagonaria Coral that are slightly ...

Petoskey stones have a larger, more symmetrical hexagonal pattern than Charlevoix stones. Rock collectors in northern ...