But scientists have for a long time thought this just was never going to be possible. They thought you just wear out, there's nothing you can do about it -- kind of like an old shoe. But if you look in nature, you see that different kinds of animals can have really different lifespans.
Dar oamenii de stiinta au crezut pentru mult timp ca acest lucru nu va fi niciodata posibil Au crezut ca pur si simplu ne uzam si ca nu avem ce face -- la fel ca in cazul unui pantof vechi Dar daca te uiti in natura, vei vedea ca diferite tipuri de animale pot avea sperante de viata foarte diferite.