American, which replaced its top operations executive last month, says its aging fleet has led to increased cancellations because of more mechanical breakdowns.

WSJ: The Leader in Lost Bags, Canceled Flights

Studies of free radicals, a major suspect in aging, led to a promising stroke drug now in final-stage trials at AstraZeneca.

FORBES: Researchers are unlocking the mysteries of aging.

The findings suggest that overall population aging and rising obesity led to a decline in the quality of livers being harvested, and ultimately to an increase in the percentage of unused organs, the researchers write.

MSN: Study finds increase in unused transplant livers

And last month, she received a patent for her Time Machine, an LED light bed, which she invented to help reverse signs of aging on the entire body.

WSJ: At My Vanity: Joanna Vargas