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It is a little bit ironic that today we are trying to buy tents and shelters for our outdoor excursions and adventures when the concept of a shelter has been around for a while; quite a while indeed, if you think that the first shelters that we have notices about were created during the night of times, around one thousand million years ago, not by humans, but by small animal organisms that populated Earth at that time. This is not a fairy tale, but a tale of palaeontology: humans have been around for about one million years here, while these mysterious animals preceded us by one thousand times the span of our existence as a species. Back then, these organisms secreted the first carapaces ever; some seem remarkably similar to escargots but others are alien, bizarre and incomprehensible; they all attempted to protect themselves, albeit we cannot determine from what. A thousand million years ago Earth was a very different place indeed; the flora and faunas of that time were incredibly primitive, and almost in all cases microscopic. These ancient plants and animals have very little relation to the modern evolutionary creations of nature that we see when we go camping. These organisms were far from rare: in ancient, Precambrian rocks they are everywhere to be found, but we don't know what they were, or where they came from. But as we try to do now, these little living things used to build their own shelters in the wilderness, even such a strange and alien one to us.
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