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Dolphins and orcas have passed the evolutionary point of no return to ever live on land again
(www.livescience.com)
just science related topics. please contribute
note: clickbait sources/headlines aren't liked generally. I've posted crap sources and later deleted or edit to improve after complaints. whoops, sry
Rule 1) Be kind.
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I don't screen everything, lrn2scroll
Mass exctincrions aren't "around the corner," they're just a part of life on Earth. They've happened several times before, and they will probably continue to happen. It's not a coming thing--it's the reason mammals rule the Earth right now, and why almost all life uses oxygen.
source: https://en.wikipedia.org/wiki/Extinction_event?wprov=sfla1
I think you might have misunderstood me. I'm not arguing that we're not understand one right now. I'm just saying that it happens quite frequently, in geologic time. Definitely not trying to minimize the how harmful of an impact we're having.