I am trying to find a really short webcomic (only a few pages long) that I read I think around 5 years ago on the Internet.
If I remember correctly the setting, it was about a doctor and his assistant who were present during a childbirth doing their jobs like usual. However the child, once brought to the world starts aging at an extraordinary rate, growing and getting close to 80 years old in just a few minutes.
The doctor, seeing as it was an unprecedented event decides to observe the phenomenon to see how humans would look like if they could live after a few centuries.
In the last panel, the newborn has now become a grotesque mass of flesh getting close to a few millennia old.