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Hace 3 días · t. e. Space exploration, as predicted in August 1958 by the science fiction magazine Imagination. Science fiction (sometimes shortened to SF or sci-fi) is a genre of speculative fiction, which typically deals with imaginative and futuristic concepts such as advanced science and technology, space exploration, time travel, parallel universes, and ...
Hace 2 días · Deforestation of the Amazon rainforest in Brazil's Maranhão state, 2016 Deforestation in Riau province, Sumatra, Indonesia to make way for an oil palm plantation in 2007. Deforestation in the city of Rio de Janeiro in Brazil's Rio de Janeiro state, 2009. Deforestation or forest clearance is the removal and destruction of a forest or stand of trees from land that is then converted to non ...
Hace 1 día · Ethics or moral philosophy is the philosophical study of moral phenomena. It investigates normative questions about what people ought to do or which behavior is morally right. It is usually divided into three major fields: normative ethics, applied ethics, and metaethics. Normative ethics discovers and justifies universal principles that govern how people should act in any situation.
Hace 1 día · Birth control, also known as contraception, anticonception, and fertility control, is the use of methods or devices to prevent unintended pregnancy. [1] Birth control has been used since ancient times, but effective and safe methods of birth control only became available in the 20th century. [2] Planning, making available, and using human birth ...
Hace 1 día · Cricket is a bat-and-ball game that is played between two teams of eleven players on a field at the centre of which is a 22-yard (20-metre) pitch with a wicket at each end, each comprising two bails balanced on three stumps. Two players from the batting team (the striker and nonstriker) stand in front of either wicket holding bats, with one ...
Hace 1 día · India, officially the Republic of India (ISO: Bhārat Gaṇarājya), is a country in South Asia.It is the seventh-largest country by area; the most populous country as of June 2023; and from the time of its independence in 1947, the world's most populous democracy. Bounded by the Indian Ocean on the south, the Arabian Sea on the southwest, and the Bay of Bengal on the southeast, it shares land ...
Hace 5 días · Surface waves in water showing water ripples. In physics, mathematics, engineering, and related fields, a wave is a propagating dynamic disturbance (change from equilibrium) of one or more quantities. Periodic waves oscillate repeatedly about an equilibrium (resting) value at some frequency.When the entire waveform moves in one direction, it is said to be a travelling wave; by contrast, a pair ...
