By Charles Q. Choi, Live Science Contributor Pay no attention to the person wielding a samurai sword and hacking away at a pig carcass — he's doing it for science. The bloody exercise was done to analyze wounds from both machetes and Japanese samurai swords in order to better identify murder weapons from the cut marks they leave behind. Lest you think the … [Read more...] about Why Scientists Are Stabbing Pig Carcasses with Samurai Swords