rachelle oldmixon , and lindsay moran, plastic that can stop a bullet, why is it ending up in some classrooms? i'm phil torres, i'm an entomologist. i study spiders in the rain forests of peru. that's our team, now let's do some science. ♪ ♪ >> hi and welcome to "techknow". i'm phil torres, i'm here with kosta, rachelle and lindsay. you looked at 3d printing. >> 3d printing is an industry that's blowing up right now. we explored and visited all these different groups and laboratories, that are doing 3d printing. let's take a deep dive. from trinkets and 96 inaction, 3d fashion and -- and from auto makers prototyping new parts to nasa lamping a 3d printer to replace parts. >> space exploration, this is absolutely a critical technology. >> from diy medical solutions. >> we've seen the people who made the robo hand project. >> to life altering research. >> i'm dr. ben asser. our lab makes ears. it's alive whit goes into the printer and comes out of the printer. >> each is prototighting 3d printers aren't anything like your home printer. >> 3 printing is a process that makes physical objects. a 3

rachelle oldmixon is an environmental scientists. i'm phil torres, an entomologist. now let's do some science. ♪ >> hey guys welcome to techknow where we bring you life changing innovations in the field of science. i'm phil torres and i'm here with kosta , rachelle and lindsay. >> when we think of camp lejeune, we deal with soldiers to go into the field. but there's an epidemic with soldiers returning with completely invisible wounds, i'm talking about ptsd. be camp lejeune has innovative ways of technology to combat this problem. the ugliness of war has made an indelible mark on the minds of many americans. and can linger longer after deployment has ended. posttraumatic stress disorder or ptsd was first diagnosed in 1980 but has existed for as long as there has been war. >> clearly it appears the underlying cause of those conditions were the same as the underlying causes whra what we call posttraumatic stress. we know very little of what is at the cellular level of what's causing them. the only way we can find out those answers is through technology. >> one promisin