Originally Posted by
FlyingHoustonian
dead babies are not dangerous items relating to the safety of the aircraft and are not prohibited on the TSA webpage-no bag check-let it through, it is not the TSA's job to find dead babies !!!!!

Sarcasm aside, dead humans (when not properly preserved) are a public health threat, and would be dangerous to other people on the aircraft.
I'd say they are probably a much bigger danger than knives or guns, as they are don't require intent to cause harm (most knives or guns detected at checkpoints probably represent no actual threat).