pplpod

In the first century AD Pliny the Elder recorded that Romans thought the huge triangular stones they found were serpent tongues that fell from the sky during lunar eclipses, and Renaissance nobles dipped these tongue stones in wine to detect poison. In 1616 Fabio Colonna burned one and found carbon, proving it organic, and in the 1660s Nicolas Steno compared them with the teeth of a great white's...

On March 26, 2024 the 980 foot, Singapore flagged container ship Dali left the Port of Baltimore at 12:44 a.m. with two harbor pilots aboard. At 1:24 a.m., moving at nearly nine knots in the Fort McHenry channel, it blacked out, losing steering, cooling, bow thrusters, and fuel pumps. An electrician restored low voltage power and an emergency generator returned some steering, but the flushing pump...

Box jellyfish, the Cubozoa, were moved out of the true jellyfish in 1973 because they are active hunters rather than drifters. A shelf of tissue called the velarium narrows the bell opening like a thumb over a hose, driving them at up to two meters per second with 180 degree turns in a couple of pulses. They rise into schools of fish and prawns, flip, sink with tentacles spread, and pass prey to t...

The bound captive stepping off a board over the sea is the classic pirate image, yet it virtually never happened during the Golden Age of Piracy, from the late 1600s to about 1730. The earliest documented account comes from a 1763 report in the Public Advertiser describing crews near Guadeloupe and the Grenadines who made captured sailors walk into the sea on a plank fixed for that purpose, with o...

A catamaran is simply two parallel hulls of equal size, and that wide stance gives it form stability without the heavy lead keel a monohull needs, so it sits light and shallow in the water. The design was pioneered by Austronesian peoples, and it carried them across the Pacific and Indian Oceans as far as Madagascar. Anthropologists of the 1930s and 1940s assumed catamarans evolved from outrigger...

Thor Heyerdahl, the Norwegian adventurer, zoologist, and ethnographer who lived from 1914 to 2002, nearly drowned twice as a boy in Larvik and grew up terrified of the water. His mother passed on her fascination with Charles Darwin, and he kept a homemade zoological museum with a live viper in his bedroom. In 1936, the day after marrying Liv Coucheron-Torp, he left for Fatu Hiva in the Marquesas u...

A 1960 US Air Force airframe maintenance manual sends mechanics to Waterline 50 to repair a supersonic jet. The episode explains why. A ship's hull is all compound curves, so naval architects draw waterlines, horizontal slices parallel to the water's surface, like contour lines on an inverted topographic map, letting builders read the hull's exact shape at every depth on a two dimensional lines pl...

Stockton Rush co founded OceanGate in 2009 with shallow wreck dives off California and in the Gulf of Mexico, but he knew the Titanic was the name that would sell seats at up to $250,000 each. He called safety regulations a pure waste and opposed the Passenger Vessel Safety Act of 1993. Rather than a titanium sphere, the Titan was a 2.4 meter carbon fiber cylinder with titanium end caps, built to...

Commercial fishing is still the second most dangerous job in the US, and sailor superstitions grew as ways to feel in control of a sea that could kill at any moment. Older scholars dismissed them as childish folklore, but many hide practical sense. Red sky at night, sailor's delight works in the mid latitudes because weather moves west to east. Whistling was said to raise a gale, but officers also...

The viral sea shanty craze got the history wrong: most of the songs, including The Wellerman, are not shanties, and 18th century pirates never sang them. A shanty was strictly a work song, sung without instruments in call and response, led by a shantyman who acted as a foreman timing the crew's effort. Leisure songs in the forecastle were forebitters. The Royal Navy banned singing at work, keeping...

Launched in 1797, the 44 gun frigate USS Constitution is the oldest commissioned naval vessel still afloat, though wooden warships of her day lasted perhaps 10 to 15 years. The Naval Act of 1794 funded six frigates to fight Barbary piracy, and Joshua Humphreys designed them long and narrow for speed but heavily gunned, with diagonal riders inside a 21 inch hull of southern live oak cut by enslaved...

Artemis II astronauts carry an emergency backup built on a design about 300 years old: the sextant. Isaac Newton sketched the theory in unpublished writings, and around 1731 John Hadley in England and Thomas Godfrey in America independently built instruments using double reflection. Older tools like the mariner's astrolabe and cross staff depended on a steady plumb line, useless on a pitching deck...

On July 12, 1999, the United States sent its last commercial Morse message, repeating the 1844 words What hath God wrought, and in January 1997 the French Navy signed off with a call before its eternal silence. Yet the code never went quiet. Samuel Morse first planned to send only numbers keyed to heavy code books, but Alfred Vail counted the metal type in a Morristown, New Jersey print shop and g...

Dutch sailors believed tiny protective spirits lived in the carved figure at the bow, and that a ship lost without one doomed its crew's souls to haunt the sea. The urge to give a ship a face runs back millennia: Greek galleys painted eyes on their bows, Phoenicians carved horse heads for speed, the lionesses on Ramses III's ships in the Medinet Habu relief likely represent the war goddess Sekhmet...

The worst maritime disaster in US history was not the Titanic but the Sultana, a wooden steamboat whose boilers exploded on the Mississippi at two in the morning in April 1865, killing up to 1,700 people. Most were Union soldiers freed from prison camps such as Andersonville, packed aboard far past legal capacity, and the news was buried beneath the hunt for John Wilkes Booth. The episode traces h...

From its royal monopoly in 1600 until 1834, the British East India Company controlled trade between England, the Cape of Good Hope, India, and China, and its East Indiamen were the largest merchant ships regularly built anywhere. At 1,100 to 1,400 tons, with two accommodation decks and a tumblehome hull that kept the weight of upper deck cannons near the centerline, they were built like warships....

Nantucket began as geological debris: a pile of sand and gravel bulldozed south by the Laurentide Ice Sheet, left as a moraine and outwash plain, and cut off from the mainland by rising seas 5,000 to 6,000 years ago. Its name likely comes from an Algonquian word some translate as sandy, sterile soil tempting no one. In 1659 Thomas Mayhew sold 90 percent of his interest to Tristram Coffin and his i...

In May 1498 an exhausted Vasco da Gama knelt in a temple in Calicut, modern Kozhikode, and prayed before a statue he took for the Virgin Mary. It was the Hindu goddess Parvati. Born in Sines in the 1460s to a minor noble family tied to the Order of Santiago, da Gama was a naval enforcer, not a scholar, when Portugal chose him to break the Venetian and Mamluk grip on the spice trade. In July 1497 h...

Trim was born in 1799 aboard HMS Reliance on its voyage from the Cape of Good Hope to Botany Bay. As a kitten he fell overboard, swam back to the hull, and climbed a rope to the deck, earning a place as companion to explorer Matthew Flinders. Flinders described him as black with white paws, a white chin and a white star on his chest, and named him after the loyal Corporal Trim in Laurence Sterne's...

The Great Barrier Reef stretches over 2,300 kilometers off northeast Australia and covers about 344,400 square kilometers in more than 2,900 reefs and 900 islands, all built by pencil eraser sized coral polyps laying limestone cups. Australia drifting north about seven centimeters a year reached the Coral Sea some 24 million years ago, but the living reef began only about 9,000 years ago as rising...

Norwegian ethnographer Thor Heyerdahl believed Polynesia was settled not from Asia but by fair skinned Tiki people who drifted from pre Columbian Peru, pointing to resemblances between Easter Island's moai and Peruvian monoliths and to the Hanau Eepe and Hanau Momoko legend. To prove the drift possible, he built the Kon-Tiki in a Peruvian naval dockyard from nine balsa logs up to 45 feet long, las...

Coleridge's painted ship upon a painted ocean made the doldrums a byword for stagnation, but the region is the Intertropical Convergence Zone, a band where the northeast and southeast trade winds collide near the equator and are forced upward as the rising branch of the Hadley cell. Horizontal wind dies at the surface while violent convection builds towering thunderstorms, which is why sailing shi...

Basque sailors called them asesina ballenas, whale killers, and translation flipped the name to killer whale, though the orca is the largest dolphin. Males reach 33 feet and over 10 tons and hear their echolocation clicks through a hollow lower jaw. Pods hunt with local techniques: carousel feeding on Norwegian herring with bubbles and tail slaps, wave washing seals off Antarctic ice floes, and fl...

Built by Caledon in Dundee and completed in 1902, the Leyland Line cotton carrier SS Californian was the largest ship yet built in the city, and moving her boilers crushed roads and burst water pipes. In April 1912 she carried no passengers when Captain Stanley Lord stopped her in an ice field at 10:20 p.m. on April 14. Wireless operator Cyril Evans warned nearby ships, and the Titanic's Jack Phil...

While rival lines chased the Blue Riband with overpowered liners, Cunard ordered the modest RMS Carpathia, launched in 1902: about 558 feet long, around 14 knots, fitted for second and third class passengers and frozen meat, with fuel efficient quadruple expansion engines that spared her the vibration of faster ships. By 1905 she was refit for over 2,500 passengers, adding first class. On the nigh...