Some billionaires are trying to conquer space. Others maintain a more earthbound ambition: to outsmart the Grim Reaper.

And deep-pocketed age-hackers are putting their money where their mouths are. Larry Ellison — chairman of the software giant Oracle — has donated around $500,000 to anti-aging research. Google co-founder Larry Page helped fund Calico, a lab that describes itself as wanting “to better understand the biology that controls aging and life span.”

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