Dinosaur die-off cleared way for gigantic mammals Popular link> http://news.yahoo.com/s/ap/20101125/ap_on_sc/us_sci_mammal_evolution Science link> http://www.sciencemag.org.libproxy.helsinki.fi/content/330/6008/1216.full.pdf?sid=116e1a41-08cc-4844-b662-90e73b840684 — Majid