Journals: (contain peer reviewed articles)
Proceedings of the National Academy of Sciences.
Journal of the American Medical Association.
New England Journal of Medicine.
JOVE: the Journal of Visualized Experiments. A video journal for demonstrating laboratory techniques. (Mostly open -source but unfortunately not all articles are available).
Magazines: (written for the general public; do not contain peer reviewed articles)
American Museum of Natural History.
IUCN, International Union for Conservation of Nature. (the world’s oldest and largest global environmental organization.)
NASA. National Aeronautics and Space Administration.
NOAA. federal agency focusing on oceans and atmosphere (includes weather and climate)
Nobel Prize official website.
Public Library of Science blogs and journals for biology & medicine.
Science.gov is a gateway to the enormous amounts of information produced by U.S. Federal scientists. Science.gov searches over 60 databases and over 2200 selected websites from 15 federal agencies.
Smithsonian. National Museum of Natural History.