A mutation is a change that occurs in our DNA sequence, either due to mistakes when the DNA is copied or as the result of environmental factors such as UV light and cigarette smoke.
If you were born in 1929 or later, you need to work at least 10 years to become eligible for Social Security. The SSA determines eligibility with a system of credits. Basically, you earn up to four credits for every year worked, and you need a total of 40 credits to qualify for Social Security.
If you can't or don't want to wait until full Social Security retirement age, it's possible to begin collecting Social Security as early as age 62. While this may seem tempting, you should try to avoid it if possible. Your monthly benefit will be reduced by about 0.5% for every month you start collecting before full retirement age.