Aging rates/human vs. dog

[jarice at delphi.com]

David Hinz W-641 548-3221 <hinz at wind> writes:
 
>Why do dogs often have cataracts when they reach the age of, say, 12 years,
>but in humans it takes maybe 5 times as long?  Are the cells aging at a
>different rate, and if so, why?  If we knew why, could we do something 
>about affecting aging rates?
 
One answer may be the much higher levels of antioxidants present in
longer-lived animals, including man. Several recent studies also show
that antioxidant supplementation may delay or prevent cataract formation.