How an immortal jellyfish could end evolutionary theory as we know it

Turritopsis dohrnii, the ‘immortal jellyfish’. Image by Dr. Karen J. Osborn via Wikimedia (CC0 1.0)
Caterpillar to pupae to butterfly metamorphosis. Photos by Nick Hobgood via Wikimedia (CC BY-SA 3.0)
Skulls of Triceratops (A) and Torosaurus (B). Torosaurus has a larger frill with two holes in it. Photos by Nicholas R. Longrich, Daniel J. Field via Wikimedia (CC BY 2.5)
A cladogram of the evolution of tetrapods showing the best-known transitional fossils. From bottom to top: Eusthenopteron, Panderichthys, Tiktaalik, Acanthostega, Ichthyostega, Pederpes. Image by Maija Karala via Wikimedia (CC BY-SA 3.0)
Life cycle of the green frog (Rana clamitans). Image by LadyofHats via Wikimedia (CC0 1.0)
Biota of the Burgess Shale, one of the earliest fossil layers, yet filled with complex organisms. Image by M. Alan Kazlev via Wikimedia (CC0 1.0)
Fauna of the Ediacaran. Image by Foolp via Wikimedia (CC BY-SA 4.0)

Ben writes on the theory and social science of communication, and anything else that comes to mind

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