From asteroids, many in-demand metals or hydrogen can be harvested. Think of what this makes possible: create docking stations where spacecraft can refuel, and asteroids become the stepping stones for the exploration of space. The depletion of resources on Earth will make space exploration necessary. There is also the prospect of wealth that will drive companies to invent the necessary transportation and mining techniques. Governments and institutions like NASA already sponsoring.
Now here is another thought. If asteroid mining is such a useful practice, then we are probably not the first species to invent it. More advanced alien races must already possess these techniques or have practiced asteroid mining in the past or present. Some have suggested that we should look for signs of such activity in asteroid belts to help discover alien civilizations in space.
But could asteroid mining also bring us evidence that ancient aliens once visited Earth? It will not be easy, but it is possible. Chances are that we will pick accessible asteroids for mining, and end up choosing the same ones that these ancient visitors used in the distant past. We could then find evidence of their activities. Maybe their excavations, drilling activities are still visible today. And maybe, if we are even luckier, we could find their equipment, or even remains of alien species.
We wouldn't be surprised if some of the findings will look familiar. They could very well resemble ancient artifacts, structures and descriptions out of ancient legends found here on Earth - if ancient aliens actually visited Earth in our distant past. The following post was originally posted at Ancient World Mysteries Follow Ancient Visitors on Twitter and Google+ Join our Community Crop Circles
