Ancient microphone
Imagine a microphone laying around on the ground in prehistoric times. There does seem to be a lot going on in the 40 or 50 minutes allotted. Track 1 is mostly exploding volcanoes and earthquakes. Track 2 adds water. Track 3 adds some wildlife, and track 4 adds even more wildlife. It seems all these ages are afflicted by volcanoes and earthquakes. Interesting.
