Derrickson also skillfully provides an explanation for why Klaatu would be a bipedal hominid (an unlikely product of independent evolution on another planet)-- genetic engineering of placental tissue surrounding his original alien body, with embryological development sped up hundreds of times to transform him into a being recognizably human. (scientificamerican.com)
This solution implies «convergent evolution», the independent evolution of similar features in different species, considered in an earlier edition of this column.4 Here, evolution is driven by the underlying physics and mathematics. (faith.org.uk)
It also took Ding deeper into his fundamental premise — «If RNAi remains as an effective antiviral defense in plants, insects and nematodes after their independent evolution for hundred millions of years, why would it stop working with mammals?» (sciencedaily.com)