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Panspermia (Greek: πανσπερμία from πᾶς/πᾶν (pas/pan) "all" and σπέρμα (sperma) "seed") is the hypothesis that life exists throughout the Universe, distributed by meteoroids, asteroids and planetoids.
Based on comparative anatomy, there is consensus that snakes descended from lizards.[9]:11[10] Pythons and boas—primitive groups among modern snakes—have vestigial hind limbs: tiny, clawed digits known as anal spurs, which are used to grasp during mating.[9]:11[11] The Leptotyphlopidae and Typhlopidae groups also possess remnants of the pelvic girdle, sometimes appearing as horny projections when visible.
Dr. Holtzman says this research probably doesn’t mean we can domesticate snakes, but it does show that snakes are smarter than we think. They are not just wandering aimlessly. Perhaps now snakes can be trained, using the right motivation and method.
It now seems unlikely that extraterrestrial living organisms could have reached the earth either as spores driven by the radiation pressure from another star or as living organisms imbedded in a meteorite. As an alternative to these nineteenth-century mechanisms, we have considered Directed Panspermia, the theory that organisms were deliberately transmitted to the earth by intelligent beings on another planet. We conclude that it is possible that life reached the earth in this way, but that the scientific evidence is inadequate at the present time to say anything about the probability. We draw attention to the kinds of evidence that might throw additional light on the topic.
Crick and Orgel: Directed Panspermia
The rising oxygen levels may have wiped out a huge portion of the Earth's anaerobic inhabitants at the time. From their perspective it was a catastrophe (hence the name)
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