That's Impossible: Eternal LifeIs it possible to achieve eternal life? Some believe the first children who will live to the age of 1,000 have already been born. To find out how close humanity is to defeating death, we'll investigate plans to grow replacement body parts in labs, microscopic robots that could wipe out deadly diseases, and the possibility that aging itself can be reversed by taking a page out of one of history's darkest legends.

Cambridge University geneticist Aubrey de Grey has famously stated, "The first person to live to be 1,000 years old is certainly alive today …whether they realize it or not, barring accidents and suicide, most people now 40 years or younger can expect to live for centuries."

Perhaps de Gray is way too optimistic, but plenty of others have joined the search for a virtual fountain of youth. In fact, a growing number of scientists, doctors, geneticists and nanotech experts—many with impeccable academic credentials - are insisting that there is no hard reason why aging can’t be dramatically slowed or prevented altogether. Not only is it theoretically possible, they argue, but a scientifically achievable goal that can and should be reached in time to benefit those alive today.

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