Ebooks de ciencias, página 3 de 698

Las grandes preguntas del universo respondidas brevemente por Stephen Hawking, una de las mentes más brillantes de nuestro tiempo.Tras su éxito en el Reino Unido, llegan a España cuatro volúmenes que reunen los capitulos esenciales del famoso libro Breves respuestas a las grandes preguntas de Stephen Hawking:¿Como empezo todo?, ¿Que hay dentro de un agujero negro?, ¿Sobreviviremos en la Tierra?, ¿Nos sobrepasara la inteligencia artificial?En ¿Sobreviviremos en la Tierra?,el prestigioso y reconocido cosmologo analiza las amenazas que comprometen nuestra supervivencia desde el cambio climatico hasta la inestabilidad nuclear y plantea la exploracion y colonizacion del espacio como un paso logico para proteger el porvenir de la especie humana.Cada libro presenta un prologo elaborado por reconocidos cientificos nacionales, cuyo proposito es acercar el pensamiento de Stephen Hawking a los lectores interesados en comprender el origen de los agujeros negros y del tiempo, la inteligencia artificial, la posibilidad de vida mas alla de la Tierra, la figura de Dios como creador y las reflexiones en torno al futuro de la existencia humana como especie.Una oportunidad unica para descubrir, con la claridad, la sencillez, el humor y la profundidad del propio Hawking, como la ciencia desentraña los misterios del cosmos y del propio ser humano.

Las grandes preguntas del universo respondidas brevemente por Stephen Hawking, una de las mentes más brillantes de nuestro tiempo.Tras su éxito en el Reino Unido, llegan a España cuatro volúmenes que reunen los capitulos esenciales del famoso libro Breves respuestas a las grandes preguntas de Stephen Hawking:¿Como empezo todo?, ¿Que hay dentro de un agujero negro?, ¿Sobreviviremos en la Tierra?, ¿Nos sobrepasara la inteligencia artificial?En ¿Que hay dentro de un agujero negro?, el prestigioso y reconocido cosmologonos guia hacia los fenomenos mas extremos de la galaxia: los agujeros negros y la posibilidad de viajar en el tiempo, y revela como la relatividad y la mecanica cuantica transforman nuestra comprension del universo y nos acercan a los confines de las leyes mas profundas de la naturaleza.Cada libro presenta un prologo elaborado por reconocidos cientificos nacionales, cuyo proposito es acercar el pensamiento de Stephen Hawking a los lectores interesados en comprender el origen de los agujeros negros y del tiempo, la inteligencia artificial, la posibilidad de vida mas alla de la Tierra, la figura de Dios como creador y las reflexiones en torno al futuro de la existencia humana como especie.Una oportunidad unica para descubrir, con la claridad, la sencillez, el humor y la profundidad del propio Hawking, como la ciencia desentraña los misterios del cosmos y del propio ser humano.

Las grandes preguntas del universo respondidas brevemente por Stephen Hawking, una de las mentes más brillantes de nuestro tiempo.Tras su éxito en el Reino Unido, llegan a España cuatro volúmenes que reunen los capitulos esenciales del famoso libro Breves respuestas a las grandes preguntas de Stephen Hawking: ¿Como empezo todo?, ¿Que hay dentro de un agujero negro?, ¿Sobreviviremos en la Tierra?, ¿Nos sobrepasara la inteligencia artificial?En ¿Como empezo todo?, el prestigioso y reconocido cosmologoexplora el nacimiento del cosmos y cuestiona el papel de Dios en su origen. A traves de la fisica teorica, indaga en como el universo pudo surgir espontaneamente y revela la profunda conexion entre las leyes naturales, el espacio y el tiempo.Cada libro presenta un prologo elaborado por reconocidos cientificos nacionales, cuyo proposito es acercar el pensamiento de Stephen Hawking a los lectores interesados en comprender el origen de los agujeros negros y del tiempo, la inteligencia artificial, la posibilidad de vida mas alla de la Tierra, la figura de Dios como creador y las reflexiones en torno al futuro de la existencia humana como especie.Una oportunidad unica para descubrir, con la claridad, la sencillez, el humor y la profundidad del propio Hawking, como la ciencia desentraña los misterios del cosmos y del propio ser humano.

Society frequently frames crying as a loss of emotional control, a sign of weakness, or a useless biological reflex. We are taught to hold our tears back, apologizing when they spill over, completely misunderstanding the brilliant biochemical mechanism occurring in our bodies.Science reveals that not all tears are created equal. While basal tears lubricate the eye and reflex tears flush out dust, emotional tears contain a radically different chemical composition. When we cry from grief or joy, our bodies physically excrete massive amounts of stress hormones and natural painkillers, literally weeping away physiological anxiety.The Chemical Release explores the unique evolutionary biology of human crying. It explains how shedding tears is not a breakdown, but rather a highly sophisticated somatic healing process designed to rapidly down-regulate the nervous system and trigger deep social bonding among humans.Change the way you view your own emotions. Learn how suppressing tears actively harms your physical health, and discover why embracing this powerful biological release valve is the key to restoring internal balance and overcoming intense psychological stress.

With their dramatic rosettes, diverse forms and vivid colours, aeoniums have captivated growers for generations. This accessible guide combines botanical insight with hands-on cultivation advice tailored for gardeners and enthusiasts.Coverage includes: Insights into aeoniums native habitats and how this knowledge can be used to better care for your plants at home Propagation techniques for both beginners and more experienced growers How to deal with undesirable visitors and disease A wealth of practical cultivation advice grounded in both scientific understanding and applied horticultural practice Where to see and buy aeoniums An extensive directory of species and interspecific hybrids.Whether you are a beginner or an avid collector, Understanding and Growing Aeoniums will deepen your knowledge and appreciation of these extraordinary plants and help you support their future through thoughtful, informed care.

Project Blue Beam is a contentious theory that proposes a collaborative initiative by NASA and the United Nations to form a New Age belief system, aiming ultimately for the establishment of a global government. This concept, presented by Canadian journalist Serge Monast in the 1990s, has fascinated conspiracy theorists and piqued the interest of skeptics as well. The concept of Project Blue Beam revolves around the notion that sophisticated holographic systems can generate incredibly lifelike visual and auditory experiences. According to the theory, these illusions would be employed to replicate a sequence of events aimed at destabilizing current religious convictions and facilitating the emergence of a new global framework. This emerging framework would be defined by the consolidation of all countries under one centralized, authoritative governance. Monasts book Project Blue Beam (NASA) details a systematic four-step approach to accomplish this objective. Each step involves the use of advanced tools to shape public perception and create a sense of global crisis, ultimately persuading individuals to embrace the proposed New Age belief system and a unified global governance.

The following Essay owes its origin to a conversation with a friend, on the subject of Mr Godwins essay on avarice and profusion, in his Enquirer. The discussion started the general question of the future improvement of society, and the Author at first sat down with an intention of merely stating his thoughts to his friend, upon paper, in a clearer manner than he thought he could do in conversation. But as the subject opened upon him, some ideas occurred, which he did not recollect to have met with before; and as he conceived that every least light, on a topic so generally interesting, might be received with candour, he determined to put his thoughts in a form for publication.The Essay might, undoubtedly, have been rendered much more complete by a collection of a greater number of facts in elucidation of the general argument. But a long and almost total interruption from very particular business, joined to a desire (perhaps imprudent) of not delaying the publication much beyond the time that he originally proposed, prevented the Author from giving to the subject an undivided attention. He presumes, however, that the facts which he has adduced will be found to form no inconside

Este libro está destinado a proporcionar, en los doce primeros capítulos, un curso de Óptica física para alumnos de un primer curso de Física. Los capítulos del 13 al 20 pretenden dar al postgraduado conocimientos de la teoria electromagnetica de la luz y de la teoria cuantica de la interaccion entre radiacion y materia.

The final, intimate account of a dying mans voyage to Portugal, written with a courage that defies his physical decay. Fielding observes the life on board and the landscapes he passes with a mind that remains sharp, curious, and remarkably humorous. This journal offers a rare glimpse into the personal resilience of one of literatures great wits during his final days. It is a moving and dignified farewell to a world the author observed so keenly.

Discover the laws that govern the universe.Written by the legendary scientist Isaac Newton, The System of the World presents the revolutionary ideas that changed humanitys understanding of motion, gravity, and the structure of the cosmos.In this remarkable work, Newton explainsclearly and methodicallythe principles behind planetary motion, gravitational force, and the mathematical laws that shape our physical reality. His insights laid the foundation for classical physics and influenced centuries of scientific discovery.Inside, youll explore:The universal law of gravitationThe mechanics governing celestial bodiesThe scientific reasoning that transformed astronomyThe principles that continue to shape modern scienceCelebrated as one of the most important scientific texts ever written, Newtons work remains essential reading for students, scholars, and anyone fascinated by the mysteries of the universe.Add this cornerstone of scientific thought to your digital library today and experience the brilliance that redefined our world.

A atual crise ambiental e social demanda uma reflexo a respeito do estado vigente do mundo. Nosso atual modelo economico, caracterizado pelo uso indiscriminado de recursos, em um processo constante de extraço, produço, uso e descarte, se mostrou ineficiente, trazendo consequencias diretas a vida no planeta. A sociedade, ao passo que esta interligada a natureza, tem o poder de modifica-la, gerando impactos que podem ser encarados como problemas sociais. Este livro, partindo de uma perspectiva teorica da economia ecologica, buscou discorrer sobre a economia circular, apontando-a como um movimento economico alternativo, que pode contribuir para a reduço dos impactos ambientais e sociais, possibilitando um cenario de mais equidade e bem-estar social.

A quitosana e dois derivados modificados (com pirocatecol e óleo de girassol) foram empregados como adsorventes para seis diferentes corantes têxteis. Os ensaios foram realizados em soluções aquosas,

Un análisis claro y penetrante del frágil engranaje que sostiene nuestra alimentación y de los desafíos urgentes para transformarlo.«Uno de los pensadores más importantes del mundo sobre la teoría de

Las plantas nos pueden enseñar mucho acerca del «arduo arte de vivir bien».La admiración por la naturaleza parece acentuarse a medida que aumenta la población mundial y crecen las ciudades. Cuanto má

O Projeto Hortas Comunitárias em Teresina-PI faz parte de um conjunto de ações de enfrentamento à pobreza, realizadas com o objetivo de garantir meios e capacidade produtiva e de gestão a grupos comu

Close your eyes and touch your nose. You can do it because of proprioceptionthe bodys internal sense of position. But at age 19, Ian Waterman lost this sense completely due to a rare viral infection. He became a "rag doll," unable to stand, sit, or even hold a cup, despite having healthy muscles. He had lost his body.In the tradition of Oliver Sacks, this book tells the inspiring story of how Ian taught himself to move again by using his eyes to replace his nerves. He has to consciously watch every limb to move it. It is a profound exploration of the "sixth sense" that grounds us in reality, and what happens when the connection between mind and flesh is severed.

On August 21, 1986, the farmers around Lake Nyos in Cameroon went to sleep in a silent valley. By morning, every living thing1,746 people, 3,500 livestock, even the flieswas dead. There was no fire, no flood, and no violence. The killer was the lake itself.This book investigates the terrifying phenomenon of a limnic eruption, where a lake "burps" a massive cloud of carbon dioxide, displacing oxygen and drowning a valley in invisible gas. It follows the scientific detective story to understand the event, the race to degas the lake before it strikes again, and the geological ticking time bombs hiding in crater lakes around the world. A gripping look at how the earth breathes, and sometimes, holds its breath too long.

In 1991, eight "biospherians" were sealed inside a three-acre glass terrarium in the Arizona desert. Biosphere 2 contained a rainforest, an ocean, and a savannah. It was meant to prove that humans could colonize Mars. Instead, it proved how little we understand Earth. Oxygen levels plummeted, crops failed, the crew split into warring factions, and crazy ants exterminated the other insects."The Glass World" documents the most ambitious ecological experiment in history. It details the scientific hubris, the psychological strain of isolation, and the humbling realization that we cannot engineer a replacement for nature. A crucial read for the climate change era, showing that "Planet B" is much harder to build than we think.

In 1953, a young man named Henry Molaison underwent experimental surgery to cure his epilepsy. The doctor removed his hippocampus. The seizures stopped, but so did time. For the rest of his life, Henry lived in a permanent present, his memory resetting every 30 seconds. He could meet you, shake your hand, and forget you before you sat down.Known to science as "Patient H.M.," Henry became the most studied human brain in history. This book tells his poignant life story and how his tragedy proved that memory is not a single filing cabinet, but a complex network of systems. He couldnt remember doing a puzzle, yet his hands learned how to solve itproving that the body remembers even when the mind forgets.

While Americans looked up to the moon, the Soviets looked down. In the frozen wastes of the Kola Peninsula, they spent 20 years drilling the deepest hole in history. The goal was the mantle. They reached 12,262 meters (7.6 miles) before the laws of physics stopped them.This book documents the engineering marvel of the Kola Superdeep Borehole. It debunks the urban legend that they "heard the screams of hell," but the scientific reality was stranger: At that depth, rock behaves like plastic, and water exists where it shouldnt. It is a story of extreme engineering, Cold War rivalry, and the crushing heat that protects the Earths secrets.