Classroom Questions Questions for ‘Science on a shoestring’ Researchers in Brazil partnered with American scientists to study the Amazon rainforest. Here, Sabina Ribeiro (top right) and three community members measure the circumference of a tree. Fernando Schimidt Share this:FacebookTwitterRedditGoogle ClassroomEmailPrint By Science News for Students May 22, 2018 at 5:30 am Classroom questions are available for free with registration. Learn more Register to access: Client key* E-mail* Log in Already Registered? Enter your e-mail address above.