Male ducks grow a new corkscrew shaped member each year. The size of that member can vary on how much forced copulation is going on. Some ducks also have barbs that will scrape its competitors semen out.
Females have opposite twisting vaginas that also have dead ends that they tend to force...
Scientist say that all the elements after iron on the periodic table are produced after a massive star goes supernovae. So once a star starts making iron its a death sentence. Iron absorbs more energy than the star can produce in order to turn that iron into cobalt, nickel, copper, etc.
I was having constant headaches while wearing a Bluetooth watch. It's kind of woo woo but we are electrical beings and so any type of force affects us. In my opinion, while like Spencer said we are still getting hit with stuff at least it's not directly blasting you with such a close proximity...
With mine it had a few failure to feeds in the first 200 rounds roughly. Probably mostly from incorrectly loading the mags. Mine doesn't like cheap Remington or the Winchester "red rattlers". Other than that it's a good plinker