In all my years I have never come across someone quite like her. I did not know that people like her existed. I was tearing myself apart over the fact I had wasted two years of my life over someone who was not actually worth 1 minute of my time. With therapy, distance and the discovery of the writings about Sociopaths I have realised I have just had a huge learning. I understand how she was so able to walk out on her children no guilt, regret, remorse and how it was so easy to treat me so badly.
Now, lets use this knowledge of chirality, stereoisomers, and left L and right D forms to help us understand how amino acids can be used as a dating mechanism.
When the fossil was first buried in the ground, two different things start happening to the amino acids in the protein.
Some amino acids are more stable than other amino acids. So what happens is that as a fossil gets older, only the more stable amino acids are found in the fossil.