“The Gaia Hypothesis posits the Earth’s biosphere is a single living organism. Living organisms by definition reproduce. How would a planet’s biosphere reproduce?
By sending reproductive cells of some sort to other planets.
Much (possibly most) of the Earth’s biosphere consists of bacteria. In fact most animals, including humans, consist largely of bacteria. Animals are mobile housing units for bacteria.
Humans are a peculiar animal. We’re creating our own extinction event. We seem hellbent on exploiting and destroying “nature,” yet we are part of nature, produced by nature. Why would the biosphere produce homo sapiens?
An extremely popular belief of our time is that humans will colonize other planets. Many humans consider this a more worthy goal than preserving biodiversity on Earth. Humans are willing to trash this planet in order to reach others.
It is vanishingly unlikely humans will survive on other planets. But it is likely we will reach other planets. We will not colonize other planets with humans, but with bacteria.
Humans are Gaia’s way of sending bacteria to other planets, thereby reproducing.
…Over billions of years, these pioneering bacteria will evolve, growing a new biosphere of diverse life forms. A new, living planet – another Gaia – is born.”