BBC - Future - Is another human living inside you? Officially weirded-out now. I had heard of the idea of twins in the womb where one embryo/foetus absorbs the other, which was creepy, but this stuff is just nasty!
Into resting - You probably already know about a dermoid cyst? Evidence that you "nearly" had a twin, these Cysts are usually filled with hair growth but can include teeth and other stuff.
If many humans have living tissue in parts of their bodies which is genetically different from the rest of their tissue, where does that leave DNA testing? A sample of blood, saliva or tissue can have its DNA code tested, e.g. for the detection of crime, or for the establishment of paternity, and compared with another sample. This provides evidence which establishes criminality, paternity, or whatever to a high degree of accuracy - or so it has been said. But if it is scientifically possible for one person to give two samples with entirely different DNA codes, as it now seems, the accuracy of the tests is thrown into doubt. Perhaps some criminal convictions will be re-opened in the light of this.
The nasty part is the reminder that raw meat can (and usually does) contain some nasty parasitic organisms. This underlines the importance of cooking meat thoroughly. Rare and bleeding meat ('steak tartare' etc) is not merely disgusting - it's also highly dangerous.
I knew my DNA was in others... I did a good job of that in college. I had no idea I had there's in me
I Have seen a documentary, Horizon i think, where a woman was eventually demonstrated to produce two different DNA samples from different organ Biopsies.
