We all know the story of Jesus and his resurrection. Woo Hoo! It's a miracle! Well, it would have to be. And not just that he rose, but that other biological processes didn't happen. So let's talk about death and what happens from the moment of death. Fair warning, this won't be pretty.
At the nearly the moment of death, Flies are attracted to your body. Shortly after death they will lay eggs in the openings of the body so that their larva can feed on the body tissues. Fly larval gestation is 24 hours. At this point the larva are feeding on their eggs and eventually the surrounding areas until they can reach the dry air where metamorphosis can take place. This process is usually four days of feeding. So if Jesus was dead in a cave for three days, surely he would have been food for maggots by this point.
The second side of the story is that we are virtual bacteria factories. We have between 500 and 1000 forms of bacteria in our digestive systems. As soon as we die, that bacteria wants to escape the digestive tract. It will feed it's way out of the intestines into the rest of the body and feed upon it and it's enzymes that generate after death. You know how the body will begin to bloat after only 4 to 10 days, this is the gas produced in the rest of the body with nowhere to escape.
Then we have Rigor Mortis. From 3 hours to 12 hours in, Rigor Mortis will settle in and the body will become stiff. Basically all of the muscles harden up to a constricted state due the lack of oxygen flow. The resulting chemical process hardens the muscles and this wont relax for about three days when the digestive enzymes have eaten away at some of the muscle mass. In three days the body has been overcome by the bacteria.
To make matters worse, Lazarus made it four days, so what is so impressive about Jesus? But really, the writers of the Bible didn't understand the science of death. You don't die and keep the flies away. You don't die and keep the bacteria in their place. These things only happen in living people. So either Jesus didn't die, and where is the miracle? Or his body was already being consumed. "He is risen... and he has worms and bloat!"