Author: Dr. John Lienhard

Episode: 1469 The hourglass: the poor man's clock, the poor man's metaphor.  Today, let's look at the hourglass.

Episode: 1468 The evolution of the bicycle.  Today, let's talk about bicycles and freedom.

Episode: 3337  Claude Bernard’s important medical science, horrifically achieved.  Today, let’s meet a problematic scientist.

Episode: 3336 The evolution and potential demise of the lowly Nickel.  Today, let us spend the lowly nickel.

Episode: 1467 Napoleon Bonaparte and Iron in France.  Today, Napoleon builds iron monuments.

Episode: 1466 An old botany book for young girls changes scientific thinking.  Today, a young student forms a scientific theory.

Episode #3335 Learning to fly non-stop from coast to coast in America.  Today, we fly across America.

Episode: 1465 In which random statistical clusters look significant.  Today, we flip six heads in a row.

Episode: 1464 Trying to teach technologies that were novel for us, but not our students.  Today, a thought about technological change and learning.

Episode: 1463 An old pig iron smelter in the New Hampshire underbrush.  Today, an old iron works hidden in the tall grass.