Here Jag, let's ask it this way.

How many times did God come to this planet and seed it with life?

Because we can easily see the various dominant life forms in the era before each of five extinction level events. Each era with totally different life forms than the era before or after. The remains are there for any to see in the various layers of sediment.

The most recent and best understood extinction event being the Chicxulub meteor strike 66 million years ago. We can see the crater. We can see the debris field scattered from the 12 mile deep and 93 mile diameter crater.
We can see the reptile fossils (dinosaurs) below that debris field. (But absolutely no great dinosaurs above the debris field.) We can see the succeeding mammalian fossils beginning above that debris field. We can see the nature and the size of those mammals change through the millennia in the various layers of sediment. We find early felines, and canines, and ursus, and equus, and bovines, and hominids. etc, etc scattered through the layers over 66 million years until we reach modern day and modern animals.

So, did God come to Earth and seed the Earth with the reptiles at the beginning of their time. And did God then revisit the Earth 66 million years ago and seed it with mammals? And where was Man, during the first 60 million years of "the age of mammals"?

People who choose to brew up their own storms bitch loudest about the rain.