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While most mammals have whiskers, some tactile specialists—mainly small, nocturnal, and arboreal species—can actively move their whiskers in a symmetrical, cyclic movement called whisking. Whisking enables mammals to rapidly, tactually scan their environment to efficiently guide locomotion and foraging in complex habitats. The muscle architecture that enables whisking is preserved from marsupials...
Genomes for three species of turtles were recently reported in Nature Genetics and Genome Biology. The findings of Wang et al. (2013) and Abramyan et al. (2013) place the turtles as a sister group to birds and crocodiles and offer clues to the origins of this group’s remarkable physiological traits.
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