Aural exposes develop due to exposure to cold water, I used to know someone who had that issue. However why does that mean a semi aquatic ancestor is the cause?
Also, as a whitewater kayaker for 15 odd years I knew a lot of people who got exposed to cold water a lot over many years. However I only met one person who had that condition. If we're one species then why isn't this happening to all people exposed to cold water? IME it was a rare condition not a universal one such as an evolved protection. I only saw the abstract on that link so did it explain why it's not universal?
Also, as a whitewater kayaker for 15 odd years I knew a lot of people who got exposed to cold water a lot over many years. However I only met one person who had that condition. If we're one species then why isn't this happening to all people exposed to cold water? IME it was a rare condition not a universal one such as an evolved protection. I only saw the abstract on that link so did it explain why it's not universal?