We are Groot! No, really we are Groot. If you’ve ever wondered what the tree-like Guardian of the Galaxy is made of, wonder no more. Kyle does some Groot anatomy on this week's Because Science! Subscribe for more Because Science: nerdi.st/subscribe Watch the last episode: nerdi.st/2gPkN9d More science: nerdist.com/tag/science/ Watch more Because Science: nerdi.st/1E2OISu Follow Kyle Hill: twitter.com/Sci_Phile Follow Us: twitter.com/Nerdist Because Science every Thursday. Artist: Andrew Bowser Learn more: • WHERE DO TREES GET THEIR MASS FROM? n.pr/2hqiVnZ