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4 天前 · Maize / meɪz / ( Zea mays ), also known as corn in North American and Australian English, is a tall stout grass that produces cereal grain. It was domesticated by indigenous peoples in southern Mexico about 9,000 years ago from wild teosinte. Native Americans planted it alongside beans and squashes in the Three Sisters polyculture.
2 天前 · Bird. Birds are a group of warm-blooded vertebrates constituting the class Aves ( / ˈeɪviːz / ), characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a strong yet lightweight skeleton.
1 天前 · The tomato ( / təmeɪtoʊ / or / təmɑːtoʊ /) is the edible berry of the plant Solanum lycopersicum, [1] [2] commonly known as the tomato plant. The species originated in western South America, Mexico, and Central America. [2] [3] The Nahuatl word tomatl gave rise to the Spanish word tomate, from which the English word tomato derives.
3 天前 · Canonical commutation rule for position q and momentum p variables of a particle, 1927. pq − qp = h / (2 πi ). Uncertainty principle of Heisenberg, 1927. The uncertainty principle, also known as Heisenberg's indeterminacy principle, is a fundamental concept in quantum mechanics. It states that there is a limit to the precision with which ...
1 天前 · Website. sdgs .un .org. The 2030 Agenda for Sustainable Development, adopted by all United Nations members in 2015, created 17 world Sustainable Development Goals ( SDGs ). They were created with the aim of " peace and prosperity for people and the planet..." [1] [2] [3] – while tackling climate change and working to preserve oceans and forests.
2 天前 · Margaret Eleanor Atwood CC OOnt CH FRSC FRSL (born November 18, 1939) is a Canadian poet, novelist, literary critic, essayist, teacher, environmental activist, and inventor.Since 1961, she has published 18 books of poetry, 18 novels, 11 books of nonfiction, nine collections of short fiction, eight children's books, two graphic novels, and a number of small press editions of both poetry and ...
1 天前 · Botswana ( English: Land of the Tswana; / bɒtˈswɑːnə / ⓘ, also UK: / bʊt -, bʊˈtʃw -/ [17] ), officially the Republic of Botswana ( Setswana: Lefatshe la Botswana, [lɪˈfatsʰɪ la bʊˈtswana] ), is a landlocked country in Southern Africa. Botswana is topographically flat, with approximately 70 percent of its territory being the ...
