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Tangent - Earthworms are an invasive species in North America[1] [1] https://en.wikipedia.org/wiki/Invasive_earthworms_of_North_America https://en.wikipedia.or

• kibwen 3y ago
  Sort of. Earthworms are a natural species in North America, but in the northern parts of the continent they were wiped out by glaciers ten to twenty thousand years ago. https://www.smithsonianmag.com/smithsonian-institution/earthworm-native-united-states-more-questions-from-readers-180958094/ https://www.smithsonianmag.com/smithsonian-institution/earth...
  • goatlover 3y ago
    The entire idea of invasive species is kind of fraught, because organisms migrate over time. Barren volcanic islands will become seeded with life. Past extinction events change the ecological dynamic. Technically, ocean life invaded the land hundreds of millions of years ago. Land bridges open up, continents collide or separate, etc. Humans weren't the only organism to migrate out of one continent onto others.
    • croo 3y ago
      And the entire idea of species is kind of fraught because once we were all microorganisms? No. Invasive species are relatively new to the land, they disturbe the existing equilibrium often without any natural predators to hunt them and they wreak havoc. Like wild boars in USA. Like rabbits in Australia. Like humans on earth. Barren islands evolved for tens of millions of years in isolation were all over the world until humans built ships.
• pvaldes 3y ago
  Earthworms is an entire subclass of animals. There are earthworms native of USA. Other aren't.