Science

Prometheus and Methuselah

Prometheus and Methuselah   The mountains of California, Nevada, and Utah contain magical creatures. These ancient beings live thousands of feet above sea level in unforgiving terrain. Sometimes, you might encounter one, a gnarled hermit, and suspect she is dead. Yet these presences are masters of survival; they have outlasted countless human civilizations; they have […]

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Alien Aurorae

Alien Aurorae   In Episode 228 we learned the basics of an aurora, the gorgeous,  ephemeral dance of the firmaments. Solar winds slam into Earth’s magnetosphere, a meeting that kicks off a process that excites atoms in our atmosphere,  producing fluorescent displays in the sky. Those fortunate few who witness them are mesmerized and thrilled. But we earthlings

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Aurora

Aurora   The Valkyrior [Valkyries] are warlike virgins, mounted upon horses and armed with helmets and spears. /…/ When they ride forth on their errand, their armour sheds a strange flickering light, which flashes up over the northern skies, making what Men call the “aurora borealis”, or “Northern Lights”. — Thomas Bulfinch, Mythology Sorry, Disney fans, we

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Sprites, Elves, Trolls, Pixies, Ghosts, Gnomes, and Blue Jets

Sprites, Elves, Trolls, Pixies, Ghosts, Gnomes, and Blue Jets   No, we’re not traveling today to Middle-earth or into the belly of a dungeon crawler. Instead, we’ll take to the skies. All the fantastical characters of today’s title are real phenomena in the upper atmosphere! Lightning strikes – photo by Mircea Madau Most of us

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Roy G. Biv

Roy G. Biv   Many students learn the mnemonic Roy G. Biv to recall the visible colors: Red, Orange, Yellow, Green, Blue, Indigo, Violet. It’s a handy way to quickly remember the order of a rainbow spectrum. Have you ever asked yourself, “what exactly is indigo?” Is it near blue? Near violet? A mixture of the two? If

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The Loudest Sound

The Loudest Sound   On 27 August 1883, reverberations from the northwest disturbed the morning serenity of sheep ranchers outside Alice Springs, Australia. The men later described the sound as “a series of loud reports, resembling those of artillery.” No war raged in central Australia in 1883; no military exercises took place. Were these ranchers under

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