Red Eft Stage of the Red-spotted Newt, Notophthalamus viridescens

Missing Limb?  Salamander May Have Answer (NYT, Sept 24), by Andrew Pollack

regeneration stem cells
rejection genes
tissue planarian
specialization differentiation
dedifferentiation primordial
blastema redifferentiate
scar tissue embryology
developmental biology haploid
diploid totipotency
identical vs fraternal twins zygote
nuclear transplantation cleavage
fate map gamete