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The Migraine, coloured lithograph, 1823.

Tarrant's Seltzer Aperient

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Cathedrale St.Jean in Lyon, France has a 14th-century astronomical clock that shows religious feast days till the year 2019; Perpetual Calendar

Ten Days That Vanished: The Switch to the Gregorian Calendar

Figure 13: A Maxim machine gun, belt-fed and water-cooled, operated by German infantrymen, World War I.

7 Deadliest Weapons in History

Poker game. Card game. Royal Flush in poker. Hearts suit gambling

Poker Hands Ranked

Illustration for Demystified "How Dangerous is Quicksand"

How Deadly Is Quicksand?

Berries and leaves of the bittersweet nightshade (Solanum dulcamara) plant. Poisonous plant

7 of the World’s Deadliest Plants

Drinking water is poured into a glass.

Water Fluoridation: Just the Facts

Periodical Cicada, Adult, Magicicada spp. Requires 17 years to complete development. Nymph splits its skin, and transforms into an adult. Feeds on sap of tree roots. Northern Illinois Brood. This brood is the largest emergence of cicadas anywhere

Why Do Some Cicadas Appear Only Every 17 Years?

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Perimenopause symptoms can be a drag. Here's when to seek treatment • May 15, 2025, 7:50 AM ET (NPR)

Photos

The Migraine, coloured lithograph, 1823.

Tarrant's Seltzer Aperient

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migraine referred headache vascular headache traction headache tension headache chronic daily headache cluster headache migraine with aura head disease cardiovascular disease mental disorder blood disease eye disease infectious disease renal system disease immune system disorder speech disorder reproductive system disease ear disease

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