Amargasaurus was a sauropod dinosaur that lived in what is now Argentina from roughly 129 to 122 million years ago, during the Early Cretaceous epoch. The only known skeleton was discovered in 1984 and is virtually complete. Amargasaurus cazaui, the only species in the genus, was a large animal reaching 9 to 10 meters (30 to 33 feet) in length, with two parallel rows of tall spines down its neck and back. The spines, taller than in any other known sauropod, probably protruded as solitary structures supporting a keratinous sheath, and may have been used for display, combat, or defense. Alternatively, they might have formed a scaffold supporting a skin sail. A herbivore, Amargasaurus probably fed at mid-height. Discovered in sedimentary rocks of the La Amarga Formation, it is most closely related to the Late Jurassic genera Dicraeosaurus, Brachytrachelopan and Suuwassea. Together, these genera form the family Dicraeosauridae, with shorter necks and smaller body sizes than other sauropods.

Read more: https://en.wikipedia.org/wiki/Amargasaurus

_______________________________ Today's selected anniversaries:

1797:

Dropping from a hydrogen balloon 3,200 feet (980 m) above Paris, André-Jacques Garnerin carried out the first descent using a frameless parachute (schematic pictured). https://en.wikipedia.org/wiki/Andr%C3%A9-Jacques_Garnerin

1877:

The Blantyre mining disaster, Scotland's worst mining accident, occurred when an explosion at a colliery in Blantyre killed 207 miners. https://en.wikipedia.org/wiki/Blantyre_mining_disaster

1907:

A bank run forced New York's Knickerbocker Trust Company to suspend operations, which triggered the Panic of 1907. https://en.wikipedia.org/wiki/Panic_of_1907

1966:

With their album The Supremes A' Go-Go, The Supremes became the first all-female group to reach number one on the U.S. Billboard 200. https://en.wikipedia.org/wiki/The_Supremes

2001:

The controversial video game Grand Theft Auto III was first released to critical acclaim, and went on to popularise open world and mature-content games. https://en.wikipedia.org/wiki/Grand_Theft_Auto_III

_____________________________ Wiktionary's word of the day:

rhubarb: 1. Any plant of the genus Rheum, especially Rheum rharbarbarum, having large leaves and long green or reddish acidic leafstalks that are edible, in particular when cooked (although the leaves are mildly poisonous). 2. (often attributive) The leafstalks of common rhubarb or garden rhubarb (usually known as Rheum × hybridum), which are long, fleshy, often pale red, and with a tart taste, used as a food ingredient; they are frequently stewed with sugar and made into jam or used in crumbles, pies, etc. […] 3. (Britain, military, historical) A Royal Air Force World War II code name for operations by aircraft (fighters and fighter-bombers) involving low- level flight to seek opportunistic targets. […] 4. (originally theater, uncountable) General background noise caused by several simultaneous indecipherable conversations, which is created in films, stage plays, etc., by actors repeating the word rhubarb; hence, such noise in other settings; rhubarb rhubarb, rhubarb rhubarb rhubarb. 5. (US, originally baseball, countable) An excited, angry exchange of words, especially at a sporting event. 6. (US, originally baseball, by extension, countable) A brawl. https://en.wiktionary.org/wiki/rhubarb

___________________________ Wikiquote quote of the day:

What matters most is that we learn from living.   --Doris Lessing https://en.wikiquote.org/wiki/Doris_Lessing