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We harbor roughly the same number of microbes as we have cells. This complex ecosystem is crucial to our health, affecting many processes including immunity, child development and bone density regulation. Research in this area has exploded, and in this eBook, we highlight some of the most exciting work on how the microbiome develops, its influence on brain and behavior and implications in both contributing to and treating various disorders.
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This second eBook in our Ask the Experts series – Astronomy – looks skyward and explains a variety of universal phenomena and theories. Questions on stars, planets, asteroids, galaxies, black holes, space exploration and more are answered in this collection.
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Neuroscientists have shown that music recruits nearly every area of the brain, fostering connections across different regions. In this eBook, we examine the latest imaging studies and discuss the effects of music on emotion, cognition, sensation and motor function. This includes an examination of the brain's anatomy when listening to or creating music, of music's relationship to learning math and language skills and of its role in promoting social...
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Is time an illusion? Is time travel possible? Could time end? In this eBook, A Question of Time*, we take an interdisciplinary look at the fourth dimension, exploring the latest thinking on the nature of time and the ways it dominates our physical and mental worlds.
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Scientific American's "Ask the Experts" column has been answering reader questions for nearly two decades. Now, we've combed through our archives and compiled some of the most interesting entries into a series of eBooks organized by subject. In the first of the series - Physics and Math - professors and researchers tackle a wide range of natural phenomena and mathematical concepts from what is antimatter to applications of game theory to what we know...
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We humans tend to think that we are unique in our intelligence, social skill and depth of emotion, but we think too much of ourselves. The animal kingdom teems with hidden stories of the weird and fascinating, and in this eBook, Amazing Animals, we gather recent research on animal behavior, including surprising discoveries of how animals think and feel, from man's best friend to some of the earth's oddest creatures.
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The fundamental outlines of the physical world, from its tiniest particles to massive galaxy clusters, have been apparent for decades. Does this mean physicists are about to tie it all up into a neat package? Not at all. Just when you think you're figuring it out, the universe begins to look its strangest, and this eBook illustrates how answers often lead to more questions and open up new paths to insight.
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Understanding why we age and how to prevent age-related physical and mental decline can help us to live in the moment and enjoy our health at any age. In this eBook, we explore the latest thinking in why we age, strategies to help maintain good health as well as research into the limits of human longevity.
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Instead of "what if the South won the Civil War?" cosmologists ask, "what if the constants that make up the fundamental building blocks of physics were different?" Physicists argue that any slight change to the laws of physics would mean a disruption in the evolution of the universe, and thus our existence. With the many factors that had to align for us to exist, it can seem like the laws of physics might seem finely tuned to make our existence possible....
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Science history is chock full of world-changing innovations that initially faced skepticism and ridicule for being too unconventional: light bulbs, cars and home computers are just a few examples. In this eBook, we take a look at the latest out-of-the-box ideas to tackle today's biggest challenges, including so-called sponge cities designed to combat flooding, technology that mimics photosynthesis to produce fuel, modifying bacteria's genetic circuits...
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How did life begin on Earth? Does it exist elsewhere? What would those life forms be like? These fundamental questions about the nature of life and our own cosmic significance are endlessly fascinating. In this eBook, we present several theories on the origin of life, some of its extreme and surprising forms and the ongoing search for signs - or sentience - on distant worlds.
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With global population numbers projected to increase by 2 billion by 2050, a veritable food crisis is on the horizon. In this eBook we examine some of the complex factors involved in the coming "food crisis" and the innovative ideas and technologies designed to increase food production sustainably. We also examine current industry methods to increase production and the controversies surrounding them, including not only hot-button issues like genetically...
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One of the biggest discoveries in physics, the quest for the Higgs boson demonstrates the value of a good theory. In July 2012, a Higgs-like particle was found near the energies scientists expected to find it. Now, armed with better evidence and better questions, the scientific process continues. In this eBook, we've gathered our best reporting to explain that process - the theories, the search, the discovery, the ongoing questions.
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Creationists, or those who hold the belief that the universe and all life was made by divine creator, have tried to use a myriad of tactics either to ban the teaching of evolution entirely or to have creationism and/or intelligent design taught alongside it in public schools. In this eBook, Evolution vs. Creationism, we take a close look at the rise of Darwinism, the arguments and opposition by the creationist movement, whether faith and science can...
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Did NASA really spend millions creating a pen that would write in space? Is chocolate poisonous to dogs? Does stress cause gray hair? These questions are a sample of the urban lore investigated in this eBook, Fact or Fiction: Science Tackles 58 Popular Myths. Drawing from Scientific American's "Fact or Fiction" and "Strange But True" columns, we've selected 58 of the most surprising, fascinating, useful and just plain wacky topics confronted by our...
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"Cosmos" comes from a Greek word for an orderly and systematic universe. In this eBook, we present the most riveting discoveries and mind-bending ideas about our cosmic home, from what we know of the origins of the universe and the cartography of space to the most bizarre phenomena and the search for life. Discussions include the possibility that the big bang was the consequence of a black hole in a fourth spatial dimension, that cosmic ripples created...
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The sense of position and movement is often called the sixth sense, the brain's connection to the immune system might be a seventh. In this eBook, we examine the diverse functions of the brain beyond the five senses, including the glymphatic system for maintaining brain health, the processes behind intuition and new research raising questions about "brain death."
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We're back to debunk a second collection of urban lore and cultural mythology in Fact or Fiction 2: 50 (More) Cultural Myths Explained. In this sequel to our best-selling first edition, we cast our analytical eye on long-standing claims such as the "5-second rule," which insists that food dropped on the floor is safe to eat if picked up within 5 seconds, and that a "base tan" will protect against sunburn.
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Creativity was long thought to be a gift from the muses, a special quality of a select minority of people. Fortunately, more recent studies have debunked this belief, and in this eBook, we look at this difficult-to-define quality from all angles: where creativity comes from, lessons we can learn from creative geniuses and how to cultivate creativity.
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How did humans get their start as a species? This is one of the core questions that have preoccupied humankind for centuries. This volume considers the complex and often mysterious characteristics that define humanity, including its unique anatomical and neurological features, behaviors such as use of tools and language, and the social structures that are unique to the species. The book also considers how the species has evolved over time and how...
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