Author: Dr. John Lienhard

Episode: 1530 Medieval masons and the mischief of success.  Today, we meet a medieval mason.

Episode: 1529 Osborne Reynolds: of sand Reynolds Numbers.  Today, a great Victorian engineer.

Episode: 1527 How Clean Water triggered the Great Polio Epidemics.  Today, we wonder where polio came from.

Episode: 1526 Learning speech: the Paleolithic technological explosion.  Today, we learn to talk.

Episode: 1525 Liberty ships: an amateur takes over the trade.  Today, an amateur builds ships.

Episode: 1524 The other great fire of 1871: Peshtigo, Wisconsin.  Today, the other great fire.

Episode: 1523 On saying goodbye to lighthouses and cabooses.  Today, we say goodbye to lighthouses and cabooses.

Episode: 3351 The curious struggle of the Crossbow.  History is full of instances where armies cling to outmoded weapons.

Episode: 1522 A 1950 prediction of technology in the year 2000.  Today, we go fifty years into the future.