image: A Tsimane child crawls on the ground. This material relates to a paper that appeared in the Nov. 20, 2015, issue of Science, published by AAAS. The paper, by Aaron D. Blackwell at University of California, Santa Barbara in Santa Barbara, Calif., and colleagues was titled, 'Helminth infection, fecundity, and age of first pregnancy in women.' view more
Credit: Michael Gurven