Posted on · Episode: 2207 How the little-remembered eruption of Mt. Tambora killed 70,000 people and gave rise to the novel Frankenstein. Today, a terrible volcano gives birth to Frankenstein.
Posted on · Episode: 2206 A 1944 progress report on the subject of human evolution. Today, an old progress report on evolution.
Posted on · Episode: 2205 The view from above: Another way of seeing. Today, a new look — at seeing things.
Posted on · Episode: 2203 The Chankillo Observatory, first in the Western Hemisphere. Today, we learn the time of the year.
Posted on · Episode: 2202 Brownie cameras and brownie sprites — two sides of one coin. Today, cameras and sprites.
Posted on · Episode: 2201 Mount Toba: the worst volcano and the worst human catastrophe. Today, a very big volcano.
Posted on · Episode: 2200 Jays who are smarter than you’d ever have thought. Today, smart birds.
Posted on · Episode: 2199 Who were the Irish long ago? Today, when the Irish were Egyptians.
Posted on · Episode: 2198 Getting ready to invent the airplane in 1901. Today, a journal tries to read the tea leaves.
Posted on · Episode: 2197 Liszt, Petrarch, and St. Augustine. Today, Liszt and Petrarch.
Posted on · Episode: 2196 In which the future we seek to know is already among us. Today, the future is among us.
Posted on · Episode: 2195 Earth, Moon, and their inertial dance through the Heavens. Today, we keep track of the moon.
Posted on · Episode: 2194 John Smeaton: an engineer for all seasons. Today, the engineer who did everything.
Posted on · Episode: 2192 Benjamin Franklin stirs up the new technology of flight. Today, Ben Franklin assesses a newborn child.
Posted on · Episode: 2191 The steam boiler as neglected part of steam engine development. Today, steam boilers for the new steam engines.