RT Journal Article SR Electronic T1 Parasites Make Scaredy-Rats Foolhardy JF Science JO Science FD American Association for the Advancement of Science SP 525 OP 527 DO 10.1126/science.289.5479.525b VO 289 IS 5479 A1 Zimmer, Carl YR 2000 UL http://science.sciencemag.org/content/289/5479/525.2.abstract