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Carey in 2013
Carey in 2013

Mariah Carey (born 1969) is an American singer, songwriter, record producer, and actress. She rose to fame with her self-titled debut album, released on June 12, 1990, and has released fifteen studio albums, most recently Caution (2018). Known for her five-octave vocal range and signature use of the whistle register, she has been dubbed the "Songbird Supreme" by the Guinness World Records. Carey is one of the best-selling music artists, with more than 220 million units sold worldwide, and holds the record for the most number-one singles on the US Billboard Hot 100 by a solo artist. In addition, Carey's singles have spent a record 97 weeks atop the chart, and she is the only artist to have their first five singles reach number one on the chart. Carey has received various accolades, and has been inducted into the Songwriters Hall of Fame and the National Recording Registry at the Library of Congress. Rolling Stone ranked her as the fifth-greatest singer of all time in 2023. (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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Statue of Gigeiten at Akishinodera
Statue of Gigeiten at Akishinodera

June 12: Dia dos Namorados in Brazil; Loving Day in the United States (1967)

Dominic Savio
Dominic Savio
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Air India Boeing 787-8 in 2014
Air India Boeing 787-8 in 2014
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Grey-breasted mountain toucan

The grey-breasted mountain toucan (Andigena hypoglauca) is a near-threatened species of bird in the toucan family, Ramphastidae, and a member of the genus Andigena, the mountain toucans. Found in Colombia, Ecuador and Peru, grey-breasted mountain toucans are 41 to 48 centimetres (16 to 19 inches) long and weigh 244 to 370 grams (8.6 to 13 ounces). The species inhabits wet temperate montane forest, including cloud, elfin, and secondary forest, generally between 2,200 and 3,650 metres (7,200 and 12,000 feet) in elevation. This grey-breasted mountain toucan of the subspecies A. h. hypoglauca was photographed perching on a branch in the mountains of the Cordillera Central near Manizales, Colombia.

Photograph credit: Charles J. Sharp

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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.