How volcanoes may have ended the dynasty of Ptolemy and Cleopatra

Volcanic ash layers suggest eruptions may have messed with crop-dependent monsoons, leading to an era of revolt

Mt. Etna

ETNA ERUPTS  This Italian volcano (shown here in 2013) erupted in 44 B.C., likely reducing monsoon rains that fed into the Nile River and ultimately fueling civic unrest in Ptolemaic Egypt.

wead/iStockphoto

This article is only available to Science News subscribers.

Subscribers, enter your e-mail address to access our archives.

Not a subscriber?

Science News is a nonprofit.

Support us by subscribing now.

More Stories from Science News on Earth

From the Nature Index

Paid Content