The title of the vintage TV sitcom, 3rd Rock From The Sun, was a somewhat apt description of our planet.
The Earth is the third planet in our sun’s solar system and it’s mostly rock of various kinds. Earth also features water, metals and organic matter, but there is far more rock than anything else. The Earth’s rocks come in many sizes and forms.
This content is restricted to subscribers of OutdoorNews.com. If you are already an OutdoorNews.com subscriber, you can log in here. If you are not and would like to read this and all the other great content OutdoorNews.com has to offer, click here.


