Elyon – My Blog https://sobrelavidafeliz.com My WordPress Blog Wed, 19 Apr 2023 16:31:55 +0000 es hourly 1 https://wordpress.org/?v=6.7.2 Por qué los humanos hace 3.000 años tenían el cerebro más grande que el nuestro https://sobrelavidafeliz.com/2023/04/19/por-que-los-humanos-hace-3-000-anos-tenian-el-cerebro-mas-grande-que-el-nuestro/ https://sobrelavidafeliz.com/2023/04/19/por-que-los-humanos-hace-3-000-anos-tenian-el-cerebro-mas-grande-que-el-nuestro/#respond Wed, 19 Apr 2023 16:31:55 +0000 https://cristoniano.com/?p=941

Nuestros antepasados tenían cerebros más grandes.

Hace varios miles de años, los humanos alcanzaron un hito en su historia: comenzaron a surgir las primeras civilizaciones complejas conocidas.

Las personas que caminaban y se reunían en las ciudades más antiguas del mundo habrían resultado familiares en muchos sentidos para los urbanitas modernos de hoy.

Pero desde entonces, los cerebros humanos se han encogido ligeramente.

El volumen perdido, en promedio, sería más o menos equivalente al de cuatro pelotas de ping pong, dice Jeremy DeSilva, antropólogo del Dartmouth College en Estados Unidos.

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Puzzling Quantum Scenario Appears Not to Conserve Energy https://sobrelavidafeliz.com/2023/04/19/puzzling-quantum-scenario-appears-not-to-conserve-energy/ https://sobrelavidafeliz.com/2023/04/19/puzzling-quantum-scenario-appears-not-to-conserve-energy/#respond Wed, 19 Apr 2023 16:31:00 +0000 https://cristoniano.com/?p=938 The quantum physicists Sandu Popescu, Yakir Aharonov and Daniel Rohrlich have been troubled by the same scenario for three decades.

It started when they wrote about a surprising wave phenomenon called superoscillation in 1990. “We were never able to really tell what exactly was bothering us,” said Popescu, a professor at the University of Bristol. “Since then, every year we come back and we see it from a different angle.”

Finally, in December 2020, the trio published a paper in the Proceedings of the National Academy of Sciences explaining what the problem is: In quantum systems, superoscillation appears to violate the law of conservation of energy. This law, which states that the energy of an isolated system never changes, is more than a bedrock physical principle. It’s now understood to be an expression of the fundamental symmetries of the universe — a “very important part of the edifice of physics,” said Chiara Marletto, a physicist at the University of Oxford.

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