There’s more talk of panspermia in the news. We mentioned it before.
So why care? Well currently science, and human-kind understand life as something special, and something only earth could create, with very specific conditions that only exist here. But really this is just an extension of religious, and pre-copernican bias, which still holds sway over people’s beliefs about life. I have held for a long time that there is LIFE ELSEWHERE in our own solar system, on Mars at the very least, but possibly on all the planets, in the form of some microbes, or other simple lifeforms.
A discovery of life on another planet, or coming from deep space, would demonstrate clearly that life is not only not-rare, it is not fragile either. Whether or not their are other mamal size or intelligent creatures somewhere, that’s another question though.
I would also check out Deep Hot Biosphere a book by Thomas Gold. His premise about hydrocarbons not running out, requires that there is this deep hot biosphere, or the first few outer miles of the earths core, being alive with microrganisms. If he’s right, this biosphere would account for more mass than all life on the surface of the planet. It would also imply that many other planets in the solar system might hold life of similar kind, below the surface. In fact it fits in very nicely to explain all the methane being found in Mars’ atmosphere.