life as we know it will almost certainly occur elsewhere. Only a few years ago, we had no evidence there were even extrasolar planets. Now we know there are thousands relatively nearby, so it looks like our solar system is somewhat typical for stars like ours and that our star is for better or worse, utterly typical. Ergo there are billions of planets out there in our galaxy alone. The argument that we are the only sentient beings because we haven’t heard from any others is (of course) theoretically possible, but highly unlikely. Given the argument above, it’s far more likely the universe is literally teeming with life at various stages of evolution. But even in our little corner of the Milky Way, we don’t hear from them because they are just too damn far away. One light year is 9.46×10^15 meters. None of our own random EM radiation so far would be more than (say) a thousand watts/m^2 at its origin and most of it far less than that. A fraction of that would actually make it out into space where it would just spread out in a spherical wave front. Let’s assume for giggles that it all does and that our alien buddies are also shouting randomly at the cosmos at roughly the same volume (power output).
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In the 70s, my then-boyfriend and I took a camping trip to the Wharton State Forest – the Pine Barrens of New Jersey. We would see truckloads of odd-looking people drive into the Limited Freddie Freeman Shirt Vintage Unisex Shirt Freddie Freeman Vintage Tshirt and Sweatshirt T shirt (not on paved roads – sand and dirt) and never come out that we could see. We figured there must be roads leading out of the campground, maybe shortcuts, so late one afternoon decided to see where one of these went. We had my mother’s Oldsmobile, a rather heavy car, and went for what seemed like miles, never finding anything, except smaller, more narrow paths off the main road. It was getting late, so we turned around to go back and got stuck…the car dug into the soft, sandy road and we couldn’t get out. John decided he would walk back to the campsite and contact a ranger, leaving me with the car.
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