Britannica, Library of Alexandria
www.britannica.com
Inspect source provenance and supporting or contrary evidence.
Inspect the sources, claims, contrary evidence, and revisions behind a conclusion.www.britannica.com
www.petersommer.com
www.english-heritage.org.uk
whc.unesco.org
www.nps.gov
www.geolsoc.org.uk
www.ces.fau.edu
www.brown.edu
www.ncei.noaa.gov
www.ncei.noaa.gov