Atavisms: 4 Lost Traits That Returned

Atavisms: 4 Lost Traits That Returned

Every once in a while, traits thought to be lost forever suddenly reappear, like a dolphin or a whale born with complete hind limbs! Known as atavisms, these occurrences can teach us all sorts of things, like how limbs actually grow. Hosted by: Hank Green SciShow has a spinoff podcast! It's called SciShow Tangents. Check it out at
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Dollo’s Law/Atavisms Cetacean Hind Limbs Limpet Shell Twists Soil Mite Sex Big Bone Worm Males Images:
Crepidula fornicata (common Atlantic slipper snail) attached to a Strombus alatus shell (Cayo Costa Island, USA) 4
Tiny Shiny Mite
Tiny Mite
Tiny Mite
Male Osedax Bone Worm
Female Osedax priapus
Male Bone Worm

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