These organisms are classified as a kingdom, Fungi, which is separate from the other eukaryotic life kingdoms of plants and animals. A characteristic that places fungi in a different kingdom from plants, bacteria, and some protists is chitin in their cell walls.
If you will reach full retirement age in 2015, you may earn up to $3,490 per month without losing any of your benefits. But for every $3 you earn over that amount in any month, you will lose $1 in Social Security benefits.
There is no Social Security earnings limit. Age 66 is your full retirement age so that folks CAN continue to work and draw Social Security also. You can wait longer to get to your full retirement age and full benefit payment -- but you can also consider drawing a Social Security benefit at age 66 - whether retired or still working. You can continue to work and live on your working wages -- and save the Social Security payments for later, when you aren't working and need some extra cash.