Earth Science Asked by Muze on September 5, 2020
Australian animals are very different than the rest of the world. I wonder if the radiation of Australia’s Uranium deposits have anything to do with why animals uniquely evolved? For instance, marsupials have three vaginas and platypus are one of the only mammals that lay eggs.
If not Uranium what makes them so different?
https://list25.com/25-outrageous-kangaroo-facts-to-keep-your-mind-hopping/
Ahhhh, probably not. If, for example, you navigate to Marsupial at Wikipedia and click on the wonderful (it really really is!) DyMaxion map at the bottom of the info panel, you wiil see that a large part of South America, Central and North America also have these animals.
FWIW, the USA does indeed have Uranium deposits although I'm not sure about Central and South America.
Quoting from Wikipedia:
A 2010 analysis of retroposon insertion sites in the nuclear DNA of a variety of marsupials has confirmed all living marsupials have South American ancestors.
South America was connected to Antarctica for a long time (but not to North America), as was Australia.
Correct answer by gorblimey on September 5, 2020
No. The reason for Australia’s unique evolution is that it was relatively isolated from the rest of the world.
Australia isn’t too radioactive either. The fact that it has more uranium deposits than other countries is that it’s huge.
Answered by Gimelist on September 5, 2020
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