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The Boot Monument

The Boot Monument is an American Revolutionary War memorial located in Saratoga National Historical Park in the state of New York. Sculpted by George Edwin Bissell and erected during 1887 by John Watts de Peyster, it commemorates Major General Benedict Arnold's service at the Battles of Saratoga while in the Continental Army, but does not mention him on the monument as Arnold later defected from the Americans to the British. Instead, it commemorates Arnold as the "most brilliant soldier of the Continental Army". While fighting at the Battle of Bemis Heights, the second of the Saratoga engagements, Arnold was shot and severely injured in his left leg. His horse was also hit by gunfire and fell on Arnold, crushing his already injured leg. Arnold was then passed over for promotion and court-martialed. Feeling hard done by, he attempted to help the British capture the fortification of West Point but was discovered and fled to the British army. (Full article...)

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In chemistry, an amino acid is a molecule containing both amine and carboxyl functional groups. In biochemistry, this term refers to alpha-amino acids with the general formula H2NCHRCOOH, where R is an organic substituent.[1] In the alpha amino acids, the amino and carboxylate groups are attached to the same carbon, which is called the α–carbon. The various alpha amino acids differ in which side chain (R group) is attached to their alpha carbon. They can vary in size from just a hydrogen atom in glycine through a methyl group in alanine to a large heterocyclic group in tryptophan.

Beyond the amino acids that are found in all forms of life, many non-natural amino acids have vital roles in technology and industry. For example, the chelating agents EDTA and nitrilotriacetic acid are alpha amino acids that are important in the chemical industry. (more...)

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February 15: National Flag of Canada Day; Statehood Day in Serbia; Susan B. Anthony Day in some parts of the United States

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Ernest Shackleton

Ernest Shackleton (15 February 1874 – 5 January 1922) was an explorer who led three British expeditions to the Antarctic during the Heroic Age of Antarctic Exploration. He and three companions established a new record Farthest South latitude, 112 miles (180 km) from the South Pole, as part of the Nimrod Expedition of 1907–1909; Shackleton was knighted on his return home. He planned the Imperial Trans-Antarctic Expedition of 1914–1917 but his ship, Endurance, became trapped in pack ice and then sank on 21 November 1915. The crew escaped and used the lifeboats to reach Elephant Island and ultimately the island of South Georgia in a stormy ocean voyage of more than 700 nautical miles (800 mi; 1,300 km), Shackleton's most famous exploit. He returned to the Antarctic in 1921 with the Shackleton–Rowett Expedition but died of a heart attack on South Georgia, where he was buried at his wife's request. This photograph of Shackleton was taken by George Charles Beresford before 1909.

Photograph credit: George Charles Beresford; restored by Adam Cuerden

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  1. ^ Proline is an exception to this general formula. It lacks the NH2 group because of the cyclization of the side chain.