Ukrainian fighters are utilizing a maze of tunnels in Mariupol and other key cities. The use of the underground in conflict has a rich history.
Ancient military innovations – like the bit and bridle that enabled mounted horseback riding – changed the course of history.
Osama Shukir Muhammed Amin/British Museum via WikimediaCommons
Did ancient technological advancements drive social innovation, or vice versa? Studying cause and effect in the ancient world may seem like a fool’s errand, but researchers built a database to do just that.
Ashurbanipal, last major ruler of the Assyrian Empire, couldn’t outrun the effects of climate change.
British Museum
What caused the rise and then collapse 2,600 years ago of this vast empire centered on Mesopotamia? Clues from a cave in northern Iraq point to abrupt climate change.
A solar eclipse observed over Grand Canyon National Park in May 2012.
Grand Canyon National Park