If you compare some of the photographs which can be found on NASA’s website, you can really see how human beings have changed the appearance of our world over the years. The time difference between these images ranges from five to 100 years. Incredible stuff. Pedersen Glacier,
NASA just made all the scientific research it funds available for free – ScienceAlert
NASA uses PubMed to preserve and deliver freely its publications with public funding (called PubSpace). http://www.sciencealert.com/nasa-just-made-all-the-scientific-research-it-funds-available-for-free The database is called PubSpace, and the public can access NASA-funded research articles in it by searching for whatever they’re interested in, or byjust browsing all the