New research rethinks the possible prevalence of life in the Universe, suggesting that our asteroid belt—as disrupted by the gravitational influence of Jupiter—played a key role in seeding the Earth with water and organic compounds. Unable to coalesce, and situated around the solar system's "snow line," the belt provides millions of little ice trays which come smashing into the Earth on occasion. On Starts With a Bang, Ethan Siegel says "getting struck by asteroids can introduce new organics and materials into the ecosystem, and can knock off the apex animals of the time, paving the way for new species to mutate and fill niches." Research shows that an asteroid belt like our own develops in only 4% of planetary systems, but it's too soon to say if it's really a prerequisite for, say, humanity.
Tightening Life's Belt?
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"Every man is free to rise as far as he's able or willing, but the degree to which he thinks determines the degree to which he'll rise." -Ayn Rand
I recently got this comment of incredulity on my article about what wiped out the dinosaurs?
Remember that asteroid that was supposed to pass harmlessly by the Earth on Sunday? Well, things didn't go exactly as planned...
The Drake Equation is that famous equation where you count how many stars there are, figure out the chance of a star having planets, of planets having water, etc. etc. until finally you get some rough estimate of the chance of live evolving elsewhere in the universe.
Hello! This is cool! :)