A scientific breakthrough has not only slowed aging down, but even reversed it in laboratory mice.
The key is something called telomeres on the tips of chromosomes.
As people and animals age, they become damaged and frayed. But scientists at Boston's Dana-Farber Cancer Institute added an enzyme to the telomeres of aged mice and essentially restored their function.
While the process worked on the mice, researchers say manipulating human chromosomes to stop aging is still a long way off.