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Episode: 2543 Clara Adams: 150,000 miles of maiden flights.  Today, Clara Adams flies.

Episode: 2541 Charlotte, of Charlotte's Web, in real life.  Today, I relive Charlotte's Web.

Episode: 2894 Wastewater Treatment.  Today, the unmentionable.

Episode: 2666 Codes, ciphers and Alan Turing.  Today codes, ciphers and Alan Turing.

Episode: 2951 Scurvy, Vitamin C, and the Origins of the Modern Clinical Trial.  Today, we go to sea.

Episode: 2540 Semi-Submersible Ships, or how the USS Cole hitched a ride home.  Today, semi-submersible ships.

Episode: 2537 Vredefort, Chicxulub, Apophis — once and future threats to Earth.  Today, Vredefort and Apophis.

Episode: 2536 The Scapa Flow ship cemetery.  Today, Scapa Flow.

Episode: 2532 Fanny Kemble, technology, and London's circle of radical intellectual women.  Today, another kind of radical.

Episode: 2891 Specifics and Generalities: teaching and the problem of universals.  Today, what exactly is that?

Episode: 2448 Sergei Rachmaninoff visits a hypnotist to remove his writer's block.  Today, a composer unblocked.

Episode: 3288 Yellow-Bellies.  Today we consider "Yellow Bellies".

Episode: 2528 le Systeme international d'units, our real standard of units.  Today, another look at weights and measures.

Episode: 2526 John Montague, Lord Sandwich, and a little-known island chain.  Today, Sandwich's islands.

Episode: 2525 Reflections on protruding land, shipwrecks and lighthouses.  Today, protruding land.

Episode: 2524 Art Arfons' last Hurrah.  Today, a thought about folly and Function.

Episode: 2889 An important step toward solving the twin primes conjecture.  Today, almost twins.

Episode: 2658 Massively Multiplayer Math.  Today, let's talk massively multiplayer mathematics.

Episode: 2724 Let's be pedants — well, insofar as language allows.  Today, let's be pedants.

Episode: 2522 Farnum Thayer Fish, first airplane combat casualty.  Today, first aerial combat casualty.