Publisher of open access journals, mostly biomedical. Their journal PLOS ONE is highly multidisciplinary and ranges into other sciences as well. Look for the section about articles with recent news coverage.
Content is freely available and openly licensed for reuse.
The USGS website contains public-facing articles and news stories as well as technical reports (scholarly articles). Most content produced by USGS employees is in the public domain, but the website contains material from other authors and organizations as well.