Kickass Fact Comp #31. www.gq.com/story/shimiken-japanese-po... www.theguardian.com/science/neurophil... alt. source if you dont like the guardian www.pbs.org/n Kickass Fact Comp #31 www gq com/story/shimiken-japanese-po theguardian com/science/neurophil alt source if you dont like the guardian pbs org/n