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Galvanism

 Hello, my name is Andre Phillips. I'm the Youth and Family Programs Manager here, and I'd like to tell you about the Galvanis and animal electricity.

In 1780, Italian physician Luigi Galvani, along with his wife and assistant Lucia, made an unintentional discovery after a metal scalpel touched a frog leg which was being used for an experiment, and the leg twitched. The Galvanis concluded that there was an electrical fluid in the frog, and they started referring to what they called "animal electricity."  Galvani said that the electricity was coming from the dead frog, but Alessandro Volta, an Italian physicist of the time, showed that, in fact, it was the metal around the frog that was generating the electricity.  

Galvani's nephew Giovanni Aldini then made a name for himself by famously demonstrating this new phenomenon of "galvanism"; or what is now called electrophysiology.  He used Volta's creation, known as voltaic piles, to stimulate movement in humans and animals before and after death.  These events are credited by Mary Shelley with helping to inspire her novel Frankenstein, and of course, these scientists have had an enormous impact on today's world by leading the way to batteries, defibrillators, pacemakers, and more.

Ancestor's Trail
  1. Ancestor's Trail Hike
  2. Why Is Life On Earth Carbon-Based?
  3. Metazoans
  4. 900MYA we had a common ancestry with Choanoflagellates (non-animal eucaryotes)
  5. 800mya we had a common ancestry with Sponges
  6. 780mya we had a common ancestry with Placozoans
  7. 730mya Ctenophores
  8. 680mya Cnidarians
  9. 630mya Flatworms
  10. 590mya Protosomes
  11. 570mya Ambulacrarians
  12. 565mya Tunicates
  13. 560mya Cephalocordates
  14. 530mya Agnatha
  15. 460mya Chondrichthyes
  16. 440-450mya FIRST GREAT EXTINCTION
  17. 440mya Actinopterygii
  18. 417mya Dipnoi
  19. 360-375mya SECOND GREAT EXTINCTION
  20. 340mya Amphibians
  21. 310mya Sauropsids (lizard-faced non-mammalian chordates)
  22. 251mya THIRD GREAT EXTINCTION
  23. 205mya FOURTH GREAT EXTINCTION
  24. 180mya Monotremes
  25. 140mya Marsupials
  26. 105mya Afrotheres
  27. 95mya Xenarthrans
  28. 85mya Laurasiatheres
  29. 75mya Glires (Rodents and Lagomorphs)
  30. 70mya Non-primate Eurachonta (Cologus and Tree shrews)
  31. 65mya FIFTH GREAT EXTINCTION
  32. 63mya Prosimians
  33. 58mya Tarsiers
  34. 40mya Platyrrhini
  35. 25mya Catarrhini
  36. 18mya Lesser Apes
  37. 14mya Orangutans
  38. 7mya Gorillas
  39. 6mya Chimpanzees and Bonobos
  40. Human Evolution on the Ancestor's Trail
  41. 7 BILLION HUMANS