Norton Disney History and Archaeology Group
Burghley House
AP Photo/J. Scott Applewhite
How climate change contributed to the collapse of the Roman Empire and 7 other ancient civilizations
DEA / G. DAGLI ORTI/Getty Images
Norton Disney History and Archaeology Group
Burghley House
AP Photo/J. Scott Applewhite
DEA / G. DAGLI ORTI/Getty Images