Resultados para "Dark" en Ciencia

All the matter and light we can see in the universe makes up a trivial 5 per cent of everything. The rest is hidden. This could be the biggest puzzle that science has ever faced. Since the 1970s, astronomers have been aware that galaxies have far too little matter in them to account for the way...

In An Appetite for Wonder Richard Dawkins brought us his engaging memoir of the first 35 years of his life from early childhood in Africa to publication of The Selfish Gene in 1976, when he shot to fame as one of the most exciting new scientists of his generation. In Brief Candle in the Dark he...

What are the politics of nature? Who owns it, where is it, what role does it play in our lives? Does it need to be tamed? Are we ourselves natural? In A Darker Wilderness, a constellation of luminary writers reflect on the significance of nature in their lived experience and on the role of nature in the lives of Black folks in the United States. Each of these essays engages with a single archival object, whether directly or obliquely, exploring stories spanning hundreds of years and thousands of miles, traveling from roots to space and finding rich Blackness everywhere.

In the first book to critically assess the major consequences of space activities from their origins in the 1940s to the present and beyond, Daniel Deudney argues in Dark Skies that the major result of the "Space Age" has been to increase the likelihood of global nuclear war, a fact conveniently obscured by the failure of recognize that nuclear-armed ballistic missiles are inherently space weapons. 

In early May 2006, a young British climber named David Sharp lay dying near the top of Mount Everest while forty other climbers walked past him on their way to the summit. A week later, Lincoln Hall, a seasoned Australian climber, was left for dead near the same spot. Hall's death was reported around the world, but the next day he was found alive after spending the night on the upper mountain with no food and no shelter.

Climate change has been a perplexing problem for years. Casey's research into the Sun's activity, which began almost a decade ago, resulted in discovery of a solar cycle that is now reversing from its global warming phase to that of dangerous global cooling for the next 30 years or more. This new cold climate will dramatically impact the world's citizens.

At a time when most people on Earth live in regions of acute light pollution, Craig Childs takes us on a journey to rediscover the awesome power of night itself. Seeking not the absence of light, but the presence of the universe, master storyteller Craig Childs sets out to bike from the blinding...

Imagine you’re trying to build the biggest, most awesome LEGO castle ever. You gather all your colorful bricks—the reds, blues, yellows, and greens. You plan your design, start stacking the bricks, and build towers, walls, gates, and secret tunnels. Everything’s going great. But suddenly, something odd starts to happen. Parts of your castle stick together more tightly than they should. Some towers refuse to fall over, no matter how much you poke them. And even stranger, the whole play area you’re building on starts stretching.

Can you remember the first time you encountered true darkness? The kind that remains as black and inky whether your eyes are open or closed? Where you can't see your hand in front of your face? Jacqueline Yallop can. It was in an unfamiliar bedroom while holidaying in Yorkshire as a child, and...

Wilderness guide and lifelong Alaskan Bjorn Dihle weaves personal experience with historical and contemporary accounts to explore the world of brown bears - from encounters with the Lewis and Clark Expedition to frightening attacks including the famed death of Timothy Treadwell, the controversies related to bear hunting, the animal's place in native cultures, and the impacts on the species from habitat degradation and climate change. 

This book is a comprehensive guide detailing how to manage the risks associated with Legionnaires’ disease within non-domestic premises in the UK.

Because of the diseases it spreads, we have learned to distance ourselves from our waste, but the long line of engineering marvels we’ve created to do so - from Roman sewage systems and medieval latrines to the immense, computerized treatment plants we use today - has also done considerable damage to the Earth’s ecology. Now scientists tell us: We’ve been wasting our waste.

We now know that the universe is mostly dark, made up of particles and forces undetectable by our most powerful telescopes. The discovery signaled a Copernican-like revolution in astronomy: not only are we not the center of the universe, neither is the stuff of which we're made. Vera Rubin played a pivotal role in this discovery. By showing that some astronomical objects seem to defy gravity, Rubin helped convince the scientific community of the possibility of dark matter. In Bright Galaxies, Dark Matter, and Beyond, Ashley Jean Yeager tells the story of Rubin's life and work.

Embark on a captivating journey into the origins of human skin color with this thought-provoking audiobook. Through in-depth genetic studies and poignant narratives, it challenges conventional notions, revealing the intricate interplay of genetics, environment, and societal influences. From the diverse ethnic groups worldwide to the persecution of Albinos in Sub-Saharan Africa, it offers a compelling exploration of identity and diversity.

Ninety-five percent of the universe is invisible. Dark matter holds galaxies together; dark energy tears space apart. For a quarter of a century, these two phenomena have been treated as separate mysteries—independent entries in the cosmic ledger, unrelated in origin and opposite in effect. This book argues that they are the same mystery. Drawing on quantum field theory, general relativity, and a systems-theoretic perspective that spans disciplines, Boris Kriger proposes that the energy of empty space is not uniform.

On July 23, 1999, the Chandra X-Ray Observatory, the most powerful X-ray telescope ever built, was launched aboard the space shuttle Columbia. Since then, Chandra has given us a view of the universe that is largely hidden from telescopes sensitive only to visible light. In Chandra's Cosmos, Wallace H. Tucker uses a series of short, connected stories to describe the telescope's exploration of the hot, high-energy face of the universe.

Our historians today often only emphasize negative interactions between the races, and dismally fail to relay a COMPLETE HISTORY, which tells of how the noble ones of all races protected and helped one another in our country. From the inspiring examples of parents, grandparents, and ancestors, Debra undoubtedly drew strength. Many of their stories are in the opening chapters of the book. The narrative continues through the turbulent 1960s and 1970s.

What is matter? Matter is the stuff from which we and all the things in the world are made. Everything around us - from desks, to books, to our own bodies - are made of atoms, which are small enough that a million of them can fit across the breadth of a human hair. Inside every atom is a tiny nucleus and orbiting the nucleus is a cloud of electrons. The nucleus is made out of protons and neutrons, and by zooming in further, you would find that inside each there are even smaller particles: quarks.

As development and subsequent habitat destruction accelerate, there are increasing pressures on wildlife populations. But there is an important and simple step toward reversing this alarming trend: Everyone with access to a patch of earth can make a significant contribution toward sustaining biodiversity. Bringing Nature Home has sparked a national conversation about the link between healthy local ecosystems and human well-being, and this audio edition will help broaden the movement. By acting on Douglas Tallamy's practical recommendations, everyone can make a difference.

Well-heeled American corporations have long had a financial stake in undermining scientific consensus and manufacturing uncertainty. In The Triumph of Doubt, former Obama and Clinton official David Michaels details how corrupt science becomes public policy - and where it's happening today.