[heleph]

Also if you look at the skin of older people from a sunny place compared to the skin of people from an overcast place, it's noticeably tougher and more wrinkled.

I'm an Australian who has lived the last ten years in the UK and my older Australian relatives definitely have older looking skin than my husband's UK-based family.

Plus the rate of skin cancer is definitely higher in Australia. It is a real public health issue there.

[raverbashing]

You are correct, however remember that nice thing called the Ozone Layer Hole which affects the southern hemisphere

And actually, most "older people from a sunny place" you mention did not have their evolutionary roots there.

And yes, tougher and more wrinkled, but less incidence of malignant cancers (but might be because of that first item I mentioned)