The Why Files on MSN
Are Humans the First Civilization? The Silurian Hypothesis
There are over 7 billion people living on the earth right now. Tens of millions are born and die each year. Every single one of us leaves signs of our existence in the air, water, soil -- even space.
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Beyond Dinosaurs: The Silurian Hypothesis and the Mind-Bending Idea of Earth's Ancient Civilizations
Imagine looking back through Earth's incredibly vast history. We picture dinosaurs roaming lush landscapes, ancient oceans teeming with primitive life, and eventually, the rise of mammals leading to ...
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Interstellar objects such as Comet 3I/ATLAS can be sent by alien civilizations to "sow" life on Earth. At the same time, it ...
Ever since humanity began to actively explore space, one of the key objectives of any and all missions has been the detection of life, or at least the detection of the key ingredients needed to ...
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