A: A blood moon is a deep reddening of the moon caused by the Earth passing between the moon and the sun. During the period of the eclipse, light from the sun... Full Answer >
Sometimes, bones are the only accessible source of DNA, thanks to their structure, which preserves DNA comparatively well and for a long time. The main problems of DNA extraction from bones are DNA degradation due to environmental factors and the presence of soil-derived inhibitors like humus acids [1â10].
Once the body has reached the skeletal stage all that remains are bones, teeth and hair and from these DNA samples can be gathered in order to try and make identification. Likewise the teeth that are left can be used to check against corresponding dental records.