The downside to Scientifically Engineered Negligible Senesense

The downside to scientifically engineered negligible senescence:

"When I left office, I was in a quandary," [former U.S. president Jimmy] Carter told U.S. News in a telephone interview. "I was 56 years old, and I knew I had a life expectancy of 25 years or more. I began to wonder what Rosalynn [his wife] and I could do in the international world."