It was the first force to be recognized and described yet it is the least understood. It is a "force" that keeps your feet on the ground yet no such force actually exists.Gravity, to steal the words of Winston Churchill, is "a riddle, wrapped in a mystery, inside an enigma." And penetrating that enigma promises to answer the biggest questions in science: what is space? What is time? What is the universe? And where did it all come from?Award-winning writer Marcus Chown takes us on an unforgettable journey from the recognition of the "force" of gravity in 1666 to the discovery of gravitational waves in 2015. And, as we stand on the brink of a seismic revolution in our worldview, he brings us up to speed on the greatest challenge ever to confront physics.

    First published in 1992, it helped place the environment on the national agenda; now, as environmental issues move front-and-center in the public consciousness, the time is right to reflect deeply on the fate of our planet and commit ourselves to its future. While An Inconvenient Truth closely examines one menace to our environmentglobal warmingEarth in the Balance takes a broader approach, focusing on the threats that everyday choices pose to our climate, water, soil, and diversity of plant and animal life. A passionate, lifelong defender of the environment, Gore describesin brave and unforgettable termshow human actions and decisions can endanger or safeguard the vulnerable ecosystem that sustains us.

    Usually I decide to save the money so I do not have to earn more. En extremis, I repeat the old Yankee marching chant like a mantra: Make do! Wear it out! When it is gone, do without! Bum, Bum! Bum bi Dum! Bum bi di Dum, Bum bi Dum!

    But discovering the diverse moth population is simple--stay up late and set up a party for moths! Nature centers and museums host events called moth balls each summer, but kids can create their own right at home. Captivating photographs show how to lure in moths to study them. Direct address to the reader shows kids the magic of science found at home.

    In Fifty Places to Dive Before You Die Chris Santella has invited diving experts from around the world to share some of their favorite destinations, so ardent divers can experience these underwater wonders for themselves—either on location in their SCUBA gear, or at home in their armchair. The fifth in Santella’s bestselling “Fifty Places” series, the book takes divers from hot-spot destinations like Raja Ampat (off the coast of West Guinea) to old Caribbean favorites like Grand Cayman Isles. Readers will swim among whale sharks off Myanmar, befriend wolf eels off the coast of Maine, and marvel at the giant mola mola of Lembognan, Indonesia. These wonderful creatures—plus the brilliant coral reefs that often provide their backdrop—are captured in 40 gorgeous color photos from the world’s greatest underwater photographers. And for readers who want to travel to these breathtaking locales, Santella provides complete “If You Go” suggestions to help you plan your trip.

    It was a sea in name only. It was actually a bone dry, ancient dusty basin pockmarked with craters and littered with rocks and boulders. Somewhere in that 500 mile diameter basin, the astronauts would attempt to make Mankind’s first landing on the Moon. Neil Armstrong would pilot the Lunar Module “Eagle” during its twelve minute descent from orbit down to a landing. Col. Edwin “Buzz” Aldrin would assist him. On the way down they would encounter a host of problems, any one of which could have potentially caused them to have to call off the landing, or, even worse, die making the attempt. The problems were all technical-communications problems, computer problems, guidance problems, sensor problems. Armstrong and Aldrin faced the very real risk of dying by the very same technical sword that they had to live by in order to accomplish the enormous task of landing on the Moon for the first time. Yet the human skills Armstrong and Aldrin employed would be more than equal to the task. Armstrong’s formidable skills as an aviator, honed from the time he was a young boy, would serve him well as he piloted Eagle down amidst a continuing series of systems problems that might have fatally distracted a lesser aviator. Armstrong’s brilliant piloting was complemented by Aldrin’s equally remarkable discipline and calmness as he stoically provided a running commentary on altitude and descent rate while handling systems problems that threatened the landing. Finally, after a harrowing twelve and a half minutes, Armstrong gently landed Eagle at “Tranquility Base”, a name he had personally chosen to denote the location of the first Moon landing. In “Landing Eagle-Inside the Cockpit During the First Moon Landing”, author Mike Engle gives a minute by minute account of the events that occurred throughout Eagle’s descent and landing on the Moon. Engle, a retired NASA engineer and Mission Control flight controller, uses NASA audio files of actual voice recordings made inside Eagle’s cockpit during landing to give the reader an “inside the cockpit” perspective on the first Moon landing. Engle’s transcripts of these recordings, along with background material on the history and technical details behind the enormous effort to accomplish the first Moon landing, give a new and fascinating insight into the events that occurred on that remarkable day fifty years ago.

    This timely, idea-filled guide covers "classic" parks, national historical parks, national monuments, national battlefields, national scenic trails, and beyond. Hundreds of Top 10 lists highlight every park's best attractions—best lodges, best hikes, best star-gazing spots, best campfire meal spots. Destinations are covered by region, theme, season, and occasion. Photos, anecdotes from park rangers, and insider tips, plus traveler resources such as hotels and restaurants, make this the national parks guide travelers have long sought.

    Economies have been wiped out, civilizations have risen and fallen, entire species have come into being or gone extinct because of a temperature shift of just a few degrees, or a brief shortage or glut of rainfall. With so much riding on the weather, it makes you wonder how you've lived this long without knowing more about it.Don't worry it's never too late to find out about what makes the weather tick.And there's never been an easier or more enjoyable way to learn than "Weather For Dummies." In know time, you'll know enough of weather basics to be able to: Identify cloud typesMake sense of seasonal differences in the weatherUnderstand what causes hurricanes, tornadoes, and other extreme eventsMake your own weather forecastsAvoid danger during severe weatherUnderstand the global warming debateGet a handle on smog, the greenhouse effect, El Nino, and moreAward-winning science writer John D. Cox brings the science of meteorology down to earth and, with the help of dozens of cool maps and charts and stunning photographs of weather conditions, he covers a wide range of fascinating subjects, including: What is weather and how it fits into the entire global ecosystemWhat goes into making a professional daily weather forecastThe basic elements of weather, including air pressure, clouds, and humidityStorms, hurricanes, tornadoes, monsoons, and other extreme forms of weatherSeasonal weather effects and why they varyLightening, rainbows, sundogs, haloes, and other special effectsFeaturing clear explanations, stunning illustrations, and fun, easy experiments and activities you can do at home, "Weather For Dummies" is your guide to making sense of the baffling turmoil of the ever-changing skies above.

    To the philosophical the  earth is eternal, while the human race -- presumptive  keeper of the world's history -- is a mere speck  in the rich stream of life. It is known that  nothing upon Earth is forever; geography, climate, and  plant and animal life are all subject to radical  change. On five occasions in the past, catastrophic  natural events have caused mass extinctions on  Earth. But today humans stand alone, in dubious  distinction, among Earth's species: Homo  Sapiens possesses the ability to destroy  entire species at will, to trigger the sixth  extinction in the history of life. In The Sixth  Extinction, Richard Leakey and Roger Lewin  consider how the grand sprawl of human life is  inexorably wreaking havoc around the world. The  authors of Origins and  Origins Reconsidered, unimpeachable  authorities on the human fossil record, turn their  attention to the most uncharted anthropological territory  of all: the future, and man's role in defining it.  According to Leakey and Lewin, man and his  surrounding species are end products of history and  chance. Now, however, humans have the unique  opportunity to recognize their influence on the global  ecosystem, and consciously steer the outcome in order  to avoid triggering an unimaginable upheaval.From the Hardcover edition.