You'd think that centenarians -- people age 100 and older -- would owe their longevity to healthy habits, but that's not always the case. Tune in to this podcast from HowStuffWorks.com to learn more about genes, longevity and unhealthy habits.
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Short Stuff: Jeddah Tower
11:16

Ruth Lyons: TV Pioneer
45:45

Selects: Mangroves: Nature's Best Tree?
44:31