Twenty four hundred years ago, Plato, one of history’s most famous thinkers, said life is like being chained up in a cave forced to watch shadows flitting across a stone wall. Beyond sounding quite morbid, what exactly did he mean? Alex Gendler unravels Plato's Allegory of the Cave, found in Book VII of "The Republic."
A year of revolution around the world; Soviet leader Mikhail Gorbachev's new policies lead to the fall of the Berlin Wall; a government crackdown follows protests in Beinjing's Tiananmen Square; a power shift sweeps across Eastern Europe.
Early humans eventually colonized Australia, the South Pacific, and the Americas. But how did our ancestors master the oceans? Learn how new discoveries in ancient DNA research are changing our understanding of the earliest sea voyages, from Easter Island to the Bering Strait.
"I told you so..." H.G. Wells' self penned epitaph underscores a lifetime of grim yet uncanny prophecy. With stories like The Time Machine, The Invisible Man, The World Set Free, and The War of the Worlds, H.G. Wells established himself as a sci-fi writer of almost clairvoyant talent.