Rassoulzadegan stumbled upon her rodent scofflaws after altering a gene in gray mice so that their feet and the tips of their tails turned white. (discovermagazine.com)
She then injected RNA from the brains and sperm of those mice into ordinary gray mouse embryos. (discovermagazine.com)
Though the species resembled today's gray mouse lemurs, its limbs were unfit for acrobatic leaping between trees and branches or for slow climbing, says lead author Rachel Dunn of Des Moines University. (discovermagazine.com)