Today's show includes three segments:
Life's Limit
Until Leonard
Hayflick came along, everyone thought cells were
immortal. That they'd divide over and over again, forever. Hayflick
torpedoes that theory and proved that there is limit. A very
predictable limit: a magic number. To thank him, science textbooks
everywhere now refer to that as 'the Hayflick
limit.'
Fountains of Youth
Dr.
Cynthia Kenyon looks at the genes of tiny worms, and
discovers that aging may be a battle between good and evil. A
literal struggle between two genes (who she calls): The Grim Reaper
gene vs. The Fountain of Youth gene.
Grandpa
How do we deal with dying? Most of us look away. But in the
case of the Zagar family, they look closer. A father and son have a
contest to take the best pictures of their dying grandpa, and the
result is an up-close portrait of death.
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