Skip to main content
Scientific American
  • Cart 0
  • Forgot password?Loading
    Not yet registered?
  • |Newsletters
Advanced Search
  • Coronavirus
  • The Sciences
  • Mind
  • Health
  • Tech
  • Sustainability
  • Video
  • Podcasts
  • Opinion
  • Publications
  • Subscribe
  • Current Issue
  • Cart0
  • Sign In
  • Newsletters
      • Share
      • Latest

      Celebrate Math Awareness Month

      Scientific American April 1975

      Dinosaur Renaissance

      The dinosaurs were not obsolescent reptiles but were a novel group of "warm-blooded" animals. And the birds are their descendants

      • By Robert T. Bakker

      This is a preview. Make a selection below to access this issue.Already have access? Sign in.

      Having trouble accessing this article? Please visit our FAQ page for more information

      More in the April 1975 issue of Scientific American
      • Cyanate and Sickle-Cell Disease
      • Science and the Citizen, April 1975
      • The Walls of Growing Plant Cells
      View Full Contents
      Visit our Librarian Gateway for additional information on purchasing a site license to this and other products

      Support Science Journalism

      Discover world-changing science. Explore our digital archive back to 1845, including articles by more than 150 Nobel Prize winners.

      Subscribe Now!Support Science Journalism

      Follow us

      • instagram
      • soundcloud
      • youtube
      • twitter
      • facebook
      • rss

      Scientific american arabic

      العربية
      • Return & Refund Policy
      • About
      • Press Room
      • FAQs
      • Contact Us
      • Site Map
      • Advertise
      • SA Custom Media
      • Terms of Use
      • Privacy Policy
      • California Consumer Privacy Statement
      • Use of cookies/Do not sell my data
      • International Editions
      Scientific American is part of Springer Nature, which owns or has commercial relations with thousands of scientific publications (many of them can be found at www.springernature.com/us). Scientific American maintains a strict policy of editorial independence in reporting developments in science to our readers.

      © 2021 Scientific American, a Division of Springer Nature America, Inc.

      All Rights Reserved.

      Scroll To Top

      You have free articles left.

      Temp Paywall Img

      Support our award-winning coverage of advances in science & technology.

      Already a subscriber? Sign in.

      Subscribers get more award-winning coverage of advances in science & technology.

      See Subscription Options