2022
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Hace 11 horas · Recent models have favored a cold dark matter scenario, in which structures emerge by the gradual accumulation of particles. Although the astrophysics community generally accepts dark matter's existence, [16] a minority of astrophysicists, intrigued by specific observations that are not well-explained by ordinary dark matter, argue for various modifications of the standard laws of general ...
Hace 11 horas · An electronic cigarette. A cigarette is a narrow cylinder containing a combustible material, typically tobacco, that is rolled into thin paper for smoking. The cigarette is ignited at one end, causing it to smolder; the resulting smoke is orally inhaled via the opposite end. Cigarette smoking is the most common method of tobacco consumption.
Hace 1 día · The world is becoming clogged with plastic. Particles of plastic so tiny they cannot be seen with the naked eye have been found almost everywhere, from the oceans’ depths to the mountain tops. They are in the soil, in plants, in animals and they are inside us. The question is: what harm, if any, are they causing?
