What Processes Cause Aging

I think it was interesting how the reading selection described aging as oxidizing or browning, and also how metabolism is necessary for life, but also plays a role in collecting byproducts that play a role in aging.  Also, at the beginning of the reading, I think it does a good job of proving a point that even the most accomplished and strict diet follower, body builder, and "fitness nut" can't beat aging.  They can sure seem to slow down the process a lot compared to other people who don't partake in any physical activities; however, eventually aging will eventually catch up to them.  We are only human, not some fictional immortal species.  I also, as a genetics major with pre-vet concentration, thought the bit about the lab that "crashed" after 30 minutes exactly was pretty interesting.  I actually was involved in an internship last summer at a vet clinic, and we had the exact same type of case come in to us.  I thought it was very interesting and still do, how even the smallest alterations in a cell can cause such a noticeable defect.