Author: Dr. John Lienhard

Episode: 1348 Castel del Monte: in which Frederick II plays with geometry.  Today, we wonder why a castle was built.

Episode: 1347 The invention of money: an abstraction of goods and services.  Today, a history of money.

Episode: 1346 The World's Work magazine shows what we were thinking a century ago.  Today, a magazine looks at the century past, and the one to come.

Episode: 1345 Hadrian's Pantheon: The world's largest domed structure for 1800 years.  Today we build a big room.

Episode: 1344 The Monitor's flush toilet: lessons from emerging technologies.  Today, lessons from emerging technologies, under the worst conditions.

Episode: 1343 Forgotten lore: How much should we trouble to remember.  Today, the past fades away.

Episode: 1041 A Chinese pharmacopoeia -- 2000 years ago.  Today, we ask how the Chinese managed to hide their candle under a bushel.

Episode: 1040 Ancient Greece and Renaissance Europe: virtues and vices.  Today, an old Greek mummy tells us about the Renaissance.

Episode: 1342 The Wright Brothers' fight for priority over Langley.  Today, an attempt to rewrite history.

Episode: 1341 A view of physiology in 1872 -- not that long ago.  Today, let's look at medicine when my grandfather was young.