In the New York Times bestseller Extraterrestrial, Avi Loeb, the longest serving Chair of Harvard’s Astronomy Department, presented a theory that shook the scientific community: our solar system, Loeb claimed, had likely been visited by a piece of advanced alien technology from a distant star. This provocative and persuasive argument opened millions of minds internationally to the vast possibilities of our universe and the existence of intelligent life beyond Earth.

For as long as we have looked to the skies, the question of whether life on earth is the only life to exist has been at the core of the human experience, driving scientific debate and discovery, shaping spiritual belief, and prompting existential thought across borders and generations. It’s one of our culture’s favorite conversations, and yet, the idea of extraterrestrial intelligence has been largely banished to the realm of fantasy and conspiracy. Now, for the first time, the full story of our national obsession with UFOs is told.

What is the nature of unidentified aerial phenomena? Forty years ago a small cadre of dedicated researchers began actively investigating cases, interviewing witnesses, and exchanging data through a small, informal network of international contacts. Today this low-profile network, or "invisible college", has grown into a larger, multination volunteer research effort joined by many individuals. But the questions first raised 40 years ago remain current - and unanswered.

In Dimensions, Dr. Jacques Vallee reexamines the historical record that led to the modern UFO phenomenon and to the belief in alien contact. He then tackles the enigma of abduction reports, which come from various times and various countries, as well as the psychic and spiritual components of the contact experience. In the last portion of the book, he notes the factors that inhibit research into the phenomenon - the triple coverup and political motivations - and concludes that the extraterrestrial theory is simply not strange enough to explain the facts.

Now on audio! The best-selling exposé that ends the decades-old controversy surrounding the infamous and mysterious crash of an unidentified aircraft at Roswell, New Mexico, in 1947.

In February 1971, as Apollo 14 astronaut Edgar Mitchell hurtled Earthward through space, he was engulfed by a profound sense of universal connectedness. He intuitively sensed that his presence and that of the planet in the window were all part of a deliberate, universal process, and that the glittering cosmos itself was, in some way, conscious. The experience was so overwhelming, Mitchell knew his life would never be the same.

In this revised and expanded edition of Richard Dolan's previous classic on the UFO subject, he brings the listener through the tumultuous journey of the UFO/UAP subject through the early 2020s. This includes a detailed treatment of the changes to our public discussion of UFOs since 2017 and what is the likely end point of this new direction. But Dolan provides much more than this, including providing critical context of the UFO subject within the broader social, political, and technological developments of our world, something that makes him unique among UFO researchers.

Skinwalkers at the Pentagon unmasks the massive scope of the Pentagon’s landmark UFO study that ran from the Defense Intelligence Agency in Washington, DC. The Advanced Aerospace Weapon System Applications Program or AAWSAP investigated the “Tic Tac” and other “nuts and bolts” UFO events, analyzed intrusions of UFOs onto US military bases, as well as probed the plethora of bizarre phenomena that government investigators encountered on Skinwalker Ranch.

With the support of former White House Chief of Staff John Podesta, investigative reporter Leslie Kean draws on her research to separate fact from fiction and to lift the veil on decades of U.S. government misinformation. Throughout, she presents irrefutable evidence that unknown flying objects - metallic, luminous, and seemingly able to maneuver in ways that defy the laws of physics - actually exist.

More than half of American adults and more than 75 percent of young Americans believe in intelligent extraterrestrial life. This level of belief rivals that of belief in God. American Cosmic examines the mechanisms at work behind the thriving belief system in extraterrestrial life, a system that is changing and even supplanting traditional religions.

Richard Dolan's UFOs and the National Security State (Volume 1) has become a classic work of UFO history, a must for all students of this often confusing subject - or simply for those who want a deeper understanding of a key part of 20th-century history. This is the first volume of a two-part detailed chronological narrative of the national security dimensions of the UFO phenomenon from 1941 to the present.

In Cosmos, the late astronomer Carl Sagan cast his gaze over the magnificent mystery of the Universe and made it accessible to millions of people around the world. Now in this stunning sequel, Carl Sagan completes his revolutionary journey through space and time.

Communion is the iconic classic in which Whitley Strieber describes his 1985 close encounter experiences. This book, which fundamentally changed the way we understand close encounters and alien abductions, is presented here with a new introduction by the author. Do not miss this great classic and the powerful introduction that explores the situation as it stands today—even more provocative and important now, as official sources are admitting that UFOs are real unknowns and that they seem to have something to do with close encounters.

Of the many books on UFOs and aliens, this one may be unique. Richard Dolan, one of the world’s leading historians of the UFO subject, has analyzed the different alien types and agendas based on longstanding patterns observed by witnesses. This is both a careful review of the best evidence we have of human-alien interaction, as well as a bold speculation of just who the aliens are and what they want. Dolan’s analysis starts with our ancient prehistory and potential genetic modifications and monitoring by extraterrestrials.

Graham Hancock's multi-million bestseller Fingerprints of the Gods remains an astonishing, deeply controversial, wide-ranging investigation of the mysteries of our past and the evidence for Earth's lost civilization. Twenty years on, Hancock returns with the sequel to his seminal work filled with completely new scientific and archaeological evidence, which has only recently come to light.

This engaging memoir reveals the true story of the Search for ExtraterrestrialIntelligence (SETI), and discloses what we may very soon discover. Chronicling the program’s history with insight and humor, SETI senior astronomer Seth Shostak assures us that if there is sentient life in the universe, we are within decades of picking up its signal.

On March 21, 2013, the European Space Agency released a map of the afterglow of the big bang. Taking in 440 sextillion kilometers of space and 13.8 billion years of time, it is physically impossible to make a better map: We will never see the early universe in more detail. On the one hand, such a view is the apotheosis of modern cosmology; on the other, it threatens to undermine almost everything we hold cosmologically sacrosanct.

Humans have long sought to comprehend the enormities of cosmic space and time. Here, best selling science writer Timothy Ferris tells the story of that quest. He interweaves the majestic themes of astronomy, physics, religion, and philosophy with fresh and lasting portraits of the men and women who created what has been called our society's most precious treasure - its conception of the universe at large.

Since its 2009 launch, the Kepler satellite has discovered more than 2,000 exoplanets, or planets outside our solar system. More exoplanets are being discovered all the time, remarkable in their variety. Astronomer Michael Summers and physicist James Trefil explore these remarkable recent discoveries: planets revolving around pulsars, planets made of diamond, planets that are mostly water, and numerous rogue planets wandering through the emptiness of space.

A breakout best seller in Italy, now available for American listeners for the first time, Genesis: The Story of How Everything Began is a short, humanistic tour of the origins of the universe, earth, and life - drawing on the latest discoveries in physics to explain the seven most significant moments in the creation of the cosmos.

How much can we know about the world? In this audiobook physicist Marcelo Gleiser traces our search for answers to the most fundamental questions of existence, the origin of the universe, the nature of reality, and the limits of knowledge. In so doing he reaches a provocative conclusion: Science, like religion, is fundamentally limited as a tool for understanding the world. As science and its philosophical interpretations advance, we face the unsettling recognition of how much we don't know.

The Big Bang is all but dead, and we do not yet know what will replace it. Our universe's "beginning" is at an end. What does this have to do with us here on Earth? Our lives are about to be dramatically shaken again - as altered as they were with the invention of the clock, the steam engine, the railroad, the radio and the Internet.

Since its formation nearly five billion years ago, our planet has been the sole living world in a vast and silent universe. Now, Earth's isolation is coming to an end. Over the past two decades, astronomers have discovered thousands of "exoplanets" orbiting other stars, including some that could be similar to our own world. Studying those distant planets for signs of life will be crucial to understanding life's intricate mysteries right here on Earth. In a firsthand account of this unfolding revolution, Lee Billings draws on interviews with top researchers.

In 1959, the Soviet probe Luna 3 took the first photos of the far side of the Moon. Even in their poor resolution, the images stunned scientists: The far side is an enormous mountainous expanse, not the vast lava plains seen from Earth. Subsequent missions have confirmed this in much greater detail. How could this be, and what might it tell us about our own place in the universe? As it turns out, quite a lot. When the Earth Had Two Moons is an astonishing exploration of planet formation and the origins of life by one of the world’s most innovative planetary geologists.

The late great astronomer and astrophysicist describes his personal search to understand the nature of the sacred in the vastness of the cosmos. Exhibiting a breadth of intellect nothing short of astounding, Sagan presents his views on a wide range of topics, including the likelihood of intelligent life on other planets, creationism and so-called intelligent design.

In this illuminating book, the renowned theoretical physicist Lee Smolin argues that fundamental physics - the search for the laws of nature - is losing its way. Ambitious ideas about extra dimensions, exotic particles, multiple universes, and strings have captured the publics imagination -- and the imagination of experts.

Professor Brian Cox uncovers some of the most extraordinary natural events on Earth and in the universe and beyond. From the immensity of the universe and the roundness of Earth to the form of every single snowflake, the forces of nature shape everything we see. Pushed to extremes, the results are astonishing. In seeking to understand the everyday world, the colours, structure, behaviour and history of our home, we develop the knowledge and techniques necessary to step beyond the everyday.

Until the End of Time is Brian Greene's breathtaking new exploration of the cosmos and our quest to find meaning in the face of this vast expanse. Greene takes us on a journey from the big bang to the end of time, exploring how lasting structures formed, how life and mind emerged, and how we grapple with our existence through narrative, myth, religion, creative expression, science, the quest for truth, and a deep longing for the eternal.

With his signature wit and thought-provoking insights, Neil deGrasse Tyson - one of our foremost thinkers on all things space - illuminates the past, present, and future of space exploration and brilliantly reminds us why NASA matters now as much as ever. As Tyson reveals, exploring the space frontier can profoundly enrich many aspects of our daily lives, from education systems and the economy to national security and morale.

Icy, rocky, sometimes dusty, always mysterious – comets and asteroids are among the Solar System's very oldest inhabitants, formed within a swirling cloud of gas and dust in the area of space that eventually hosted the Sun and its planets. Locked within each of these extra-terrestrial objects is the 4.6-billion-year wisdom of Solar System events, and by studying them at close quarters using spacecraft we can coerce them into revealing their closely-guarded secrets. This offers us the chance to answer some fundamental questions about our planet and its inhabitants.

In the New York Times bestseller Extraterrestrial, Avi Loeb, the longest serving Chair of Harvard’s Astronomy Department, presented a theory that shook the scientific community: our solar system, Loeb claimed, had likely been visited by a piece of advanced alien technology from a distant star. This provocative and persuasive argument opened millions of minds internationally to the vast possibilities of our universe and the existence of intelligent life beyond Earth.

It has been nearly 100 years since the Apollo moon landings, when Jack and Vladimir, two astronauts on a mission to Venus, discover a mysterious void related to indigenous life on the planet. Subsequently more voids are detected on Earth, Mars, Titan, and, quite ominously, inside a planetoid emerging from the Kuiper belt. Jack is sent to investigate the voids in the Solar System and intercept the planetoid - which, as becomes increasingly clear, is inhabited by alien life forms.

With the support of former White House Chief of Staff John Podesta, investigative reporter Leslie Kean draws on her research to separate fact from fiction and to lift the veil on decades of U.S. government misinformation. Throughout, she presents irrefutable evidence that unknown flying objects - metallic, luminous, and seemingly able to maneuver in ways that defy the laws of physics - actually exist.

In February 1971, as Apollo 14 astronaut Edgar Mitchell hurtled Earthward through space, he was engulfed by a profound sense of universal connectedness. He intuitively sensed that his presence and that of the planet in the window were all part of a deliberate, universal process, and that the glittering cosmos itself was, in some way, conscious. The experience was so overwhelming, Mitchell knew his life would never be the same.

Ingo Swann -- renowned psi researcher -- reveals a long-held secret series of experiences with a "deep black" agency whose apparent charter was simple: UFOs and extraterrestrials on the moon and worries about ET telepathic/mind control powers. The agency was so secret that it had no paper trail, and hence no written secrecy agreements. Only the verbal ones, which in Ingo's case expired several years ago.

Of the many books on UFOs and aliens, this one may be unique. Richard Dolan, one of the world’s leading historians of the UFO subject, has analyzed the different alien types and agendas based on longstanding patterns observed by witnesses. This is both a careful review of the best evidence we have of human-alien interaction, as well as a bold speculation of just who the aliens are and what they want. Dolan’s analysis starts with our ancient prehistory and potential genetic modifications and monitoring by extraterrestrials.

Everyone is curious about life in the Universe, UFOs and whether ET is out there. Over the course of his thirty-year career as an astrophysicist, Adam Frank has consistently been asked about the possibility of intelligent life in the universe. Are aliens real? Where are they? Why haven’t we found them? What happens if we do?

From the outset, Hynek and Vallee make their position clear: UFOs represent an unknown but real phenomenon. The far-reaching implications take us to the edge of what we consider the known and real in our physical environment. Perhaps UFOs signal the existence of a domain of nature as yet totally unexplored. These two eminent scientists studied the UFO phenomenon for decades and collaborated on this landmark report.

In Dimensions, Dr. Jacques Vallee reexamines the historical record that led to the modern UFO phenomenon and to the belief in alien contact. He then tackles the enigma of abduction reports, which come from various times and various countries, as well as the psychic and spiritual components of the contact experience. In the last portion of the book, he notes the factors that inhibit research into the phenomenon - the triple coverup and political motivations - and concludes that the extraterrestrial theory is simply not strange enough to explain the facts.

The case against UFOs and unidentified aerial phenomena (UAP) has not been put to rest. Although UFOs "officially" did not exist for decades according to the government, reports of sightings continue to be made, and the latest releases from the government and related hearings have surprised the world. While the scientific community has put UFOs out to pasture, the evidence used to dismiss them is rare and unscientific.