g Life - Walking with the dinosaurs seems like a step into deep time – but the fossil mounds of the Pilbara region of Western Australia known as stromatolites are actually 58 times older. They may be the best evidence we have of our earliest ancestors. Our planet was something of an alien world 3.43 billion years ago when they formed, compared to today’s relatively balmy, oxygenated conditions. So they are not only important in understanding our own origins but also in the search for past and present life on other worlds such as Mars. See article.
g Message - Just how does SETI work? Here’s a good primer.
g Learning - The Smithsonian Institute itself provides an amazing tool for learning more about the Solar System without delving too deeply into the physics and mathematics behind astronomy at Exploring the Planets.
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