Ebooks de ciencias, página 9 de 702

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.

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

O crédito rural é uma das principais ferramentas da política agrícola brasileira e o Rio Grande do Sul se destaca por ser o estado com maior número e valor de operações. Essa pesquisa apresenta a aná

Y si un mundo mejor fuera posible… y estuviera más cerca de lo que creemos?En una época marcada por la división, la desconexión y la crisis medioambiental, este libro nos lleva a descubrir, de la man

Leyendo a Euclides fue escrito en 1947 con el objetivo de atraer la atención de lectores no matemáticos hacia el estudio de conceptos fundamentales de la geometría y la filosofía. Tras analizar el pensamiento socratico y deducir interesantes conclusiones de tipo filosofico, Levi introduce al lector en el analisis exhaustivo de los inmortales Elementos. La presente edicion incluye el ensayo biografico "Beppo Levi, Italia y Argentina en la vida de un matematico", de Laura Levi, hija de Beppo."La logica de la geometria de Euclides, en particular su sistematicidad y coherencia, sigue suscitando admiracion. No debiera extrañar entonces que un matematico moderno como Beppo Levi le haya dedicado un estudio profundo, aunque sin la pesada carga erudita habitual. Ni es de extrañar que, a su vez, este libro del matematico italoargentino despierte la curiosidad de lectores contemporaneos. ¿Que resulto del encuentro de Euclides con Levi a la vuelta de veintidos siglos? Lo averiguaran quienes lean este libro tan original como claro. Aprenderan a ver a Euclides, e incluso a su posible maestro, Platon, con ojos modernos. Y aprenderan, si no lo saben ya, los deleites de la conversacion con muertos sin recurrir a trucos espiritistas". Del prologo de Mario Bunge

First published in 1687, The Mathematical Principles of Natural Philosophycommonly known as the Principiais Isaac Newtons monumental work that laid the foundations of classical mechanics and modern physics. In this groundbreaking treatise, Newton formulates the three laws of motion and the universal law of gravitation, transforming humanitys understanding of the physical universe.Through rigorous mathematical reasoning and precise scientific argument, Newton explains the motion of planets, comets, tides, and objects on Earth, uniting celestial and terrestrial mechanics under a single set of principles. The work not only reshaped science in the 17th century but also influenced philosophy, engineering, and scientific thought for centuries to come.A cornerstone of scientific history, the Principia remains one of the most important and influential works ever written in the field of physics and mathematics.

In 1951, a poor African American tobacco farmer named Henrietta Lacks visited Johns Hopkins Hospital complaining of a "knot" in her womb. Doctors took a biopsy of her aggressive cervical cancer without her knowledge or consent. Henrietta died months later, but her cells did something no human cells had ever done before in a lab: they didnt die. They multiplied."The Immortal Woman" tells the story of the "HeLa" cell line, the first immortal human cells ever grown in culture. These cells became the workhorse of modern biology, essential for developing the polio vaccine, cancer treatments, and gene mapping. They have been bought and sold by the billions.Yet for decades, Henriettas family lived in poverty, unable to afford health insurance, completely unaware that a part of their mother was alive and fueling a multi-billion dollar industry. This book is a powerful exploration of medical ethics, race, and the ownership of our own bodies. It honors the woman behind the microscope slide.

A obra Gestão Ambiental: Uso de Resíduos e Efluentes no Matadouro de Namibe, Angola é um contributo essencial para a reflexão sobre o equilíbrio entre produção animal, saúde pública e sustentabilidad

On June 30, 1908, a shockwave ripped through the remote Siberian taiga with the force of 185 Hiroshima bombs. It flattened 80 million trees over 2,000 square kilometers, yet left no crater. For decades, the Tunguska Event remained a mystery, fueling theories from antimatter to alien crash sites.This book sifts through the expeditions of Leonid Kulik and modern forensic astronomy to reconstruct the terrifying reality of a "megaton airburst." It explores the fragility of our planet in a cosmic shooting gallery and the sheer luck that this impact occurred over an uninhabited wasteland rather than a metropolis like London or St. Petersburg. A humbling look at the solar systems ability to reset civilization in a fraction of a second.

No Bar com Camões é um encontro entre o amor e o tempo, sob os desígnios de um vento antigo que sopra lembranças pelas frestas de um bar onde nada termina de fato, apenas se recolhe. Ali, uma mulher

THIS book contains twelve stories of great inventions, with a concluding chapter on famous inventors of today. Each of the inventions described has added to the comforts and joys of the world. Each of these inventions has brought about new industries in which many men and women have found employment. These stories, therefore, offer an easy approach to an understanding of the origin of certain parts of our civilization, and of the rise of important industries.The story of each invention is interwoven with that of the life of its inventor. The lives of inventors furnish materials of the highest educative value. These materials are not only interesting, but they convey their own vivid lessons on how big things are brought about, and on the traits of mind and heart which make for success.It is hoped that this book will set its readers to thinking how the conveniences of life have been obtained, and how progress has been made in the industrial world. While appealing to their interest in inventions and in men who accomplish great things, may it also bring them into contact with ideas which will grip their hearts, fire the imagination, and mold their ideals into worthier forms.

Exceptional intellectual and creative achievement has often coexisted with psychological distress, but the relationship between genius and mental illness is more complex than romantic narratives suggest. This comprehensive examination explores how historical figures of extraordinary accomplishmentscientists, artists, composers, writers, and mathematiciansnavigated mental health challenges while producing transformative work, analyzing both the biographical evidence and the cultural myths surrounding creative genius.Drawing on personal correspondence, medical records, biographical accounts, and psychological research, this book reveals how individuals managed depression, anxiety, bipolar disorder, and other conditions within their historical contexts. It explores how mental distress sometimes influenced creative work, how social isolation enabled or hindered productivity, and how contemporary understanding of mental illness shaped how genius was perceived and treated. The narrative examines support systems that enabled continued work, the role of institutions in helping or harming exceptional individuals, and how economic security affected outcomes.Each profile analyzes the specific nature of their achievements, the documented evidence of mental health struggles, and how later generations romanticized or stigmatized their conditions. It addresses the myth that suffering produces genius, the reality that many struggled despite their talents rather than because of them, and how better mental health support might have extended productive lives. This work provides rigorous analysis grounded in historical evidence rather than mythology about tortured genius.

Keeping yourself and your horse safe is key to enjoying riding, wherever you are. This Ride Safe Guide is packed full of tips, guidance and practical examples to give you peace of mind that you have the knowledge and know-how to stay safe when out and about with your horse. From hacking to competing, this handy guide covers everything you may encounter while out riding, or carriage driving. The Ride Safe Guide will support you as you train for your BHS Ride Safe Award where youll learn about: riding safely on and off-road including farmland and beaches, managing hazards, communicating with other route users and much more. Whether youre enjoying a peaceful countryside hack or warming up for competition, our Ride Safe Award will give you all the key skills you need. British Horse Society offers a wide range of equestrian qualifications and awards, from foundation through to performance level. Gain a world-leading standard of qualification from a provider you can trust. For horses. For people. For life.

O petróleo é o ganhador da categoria de não ficção do prêmio Pulitzer de 1992. Às vésperas da Primeira Guerra Mundial, Winston Churchill captou uma verdade fundamental, aplicável não somente àquele m

Este libro surge de una serie de talleres y seminarios organizados por la Universidad Panamericana como parte de la Cátedra Interamericana Laudato si. A partir de la encíclica del papa Francisco, el texto aborda la crisis socioambiental como una manifestacion de una crisis mas profunda: la perdida de la dimension sagrada del mundo y la desconexion del ser humano con Dios, la naturaleza y el projimo.Dividida en tres apartados, en el primero se establece un marco teologico y filosofico sobre la crisis ecologica, analizando la critica del Papa a la modernidad y proponiendo una etica renovada. Luego, explora la "cultura del descarte" desde distintas perspectivas, incluyendo la discapacidad, la discriminacion de genero y la exclusion de los ancianos, ademas de plantear una economia mas humana y sostenible. En el tercer apartado se hace un llamado a la esperanza, rescatando enseñanzas de los pueblos originarios, reflexionando sobre la vida urbana sostenible y promoviendo una vision de la humanidad como cocreadora de un futuro mejor.A traves de diversas voces academicas y estudiantiles, este libro busca propiciar un cambio de paradigma y fomentar un compromiso real con la ecologia integral, respondiendo al llamado del papa Francisco a cuidar nuestra casa comun con una educacion transformadora.

Quem convive com gatos sabe: eles se comunicam o tempo todo, só não da forma que estamos acostumados. Como Falar Gatês é um convite leve e informativo para entender melhor a linguagem felina e fortal

Un viaje esperanzador por la capacidad de la naturaleza para adaptarse que nos enseña a enfrentar los desafíos actuales. Durante casi cuatro mil millones de años, la vida en la Tierra ha encontrado nuevas formas de adaptarse, reproducirse y prosperar, transformandose para responder a las condiciones de cada epoca. Pero el impacto humano sobre el planeta y la amenaza potencialmente devastadora del cambio climatico han puesto a prueba esa capacidad de adaptacion como nunca antes. Aun asi, la vida siempre encuentra un camino. Animales, plantas e insectos siguen afrontando el desafio y continuan adaptandose, reproduciendose y prosperando incluso en un entorno en rapida transformacion. En su ejemplo quiza encontremos tambien nosotros las claves para cambiar, para detener la destruccion que estamos causando al planeta.En El ingenio de la naturaleza, David Farrier nos invita a un viaje profundo por este mundo natural en constante cambio. Lo que descubrimos en el podria transformarnos. Las formas en que los animales se ajustan al paisaje urbano pueden ayudarnos a diseñar ciudades sostenibles. El estudio de otras inteligencias puede inspirarnos a reinventar nuestras economias. La evolucion bacteriana puede ofrecer soluciones al problema de los residuos. La biologia sintetica podria rescatar especies al borde de la extincion. Y pensar en las escalas de tiempo de la naturaleza puede guiarnos hacia un futuro mejor.La vida en la Tierra esta cambiando; la pregunta es si nosotros seremos capaces de cambiar con ella. ¿Podremos reconstruir el mundo para que toda forma de vida vuelva a prosperar?