Our galaxy is one of hundreds of billions in the universe. View of universe through the Hubble telescope and go back almost all the way to the Big Bang.

What does the Universe sound like? From the sweep of a pulsar, to the deafening roar of our boiling sun this episode explores the undiscovered soundscapes of the solar system, the galaxy, and the entire cosmos. And, is it true that in space nobody can hear you scream?!? Our scientists reveal that there are places in the Universe that prove this sci-fi statement wrong.

An examination is conducted into the world of miniature particles, as microscopic objects like neutrinos MACHOs, WIMPs and many others may ultimately lead to understanding more about the mysteries surrounding the cosmos.

Objects from space have changed history throughout the ages.

Scientists have no idea what it is, but Dark Matter and Dark Energy make up 96% of the Universe. Dark Matter is everywhere. It passes through everything we know on earth at billions of particles every second, yet no one has ever gotten a direct detection of this mysterious dark substance. An even more bewildering force is Dark Energy, which is rapidly pushing apart our Universe. Discovered only ten years ago, scientists are struggling to comprehend its unusual characteristics and answer the ultimate question; what is the fate of our Universe?

Does life exist on other planets? Astrobiology is a visionary new science that searches for life in space by combining the disciplines of astronomy, biology and geology. How did life evolve on Earth? What will life look like on other planets? These and other pertinent questions will be answered by a diverse group of scientists.

They soar through the heavens, fly through the oceans and glide along land. But these are not creatures found on a wildlife safari. These are life forms from another planet. Armed with scientific fact and a little imagination, experts come together to take you on an unprecedented journey to the edges of our imagination. Scientists, astrobiologists and astronomers create five lines of extraterrestrial evolution, and explain how creatures on the surface of Earth offer a helping hand to understanding life in The Universe.

Sodom and Gomorrah–a terrifying Biblical tale of two cities incinerated by a hail of fire and brimstone. Was this a fantastic fable, or an actual apocalyptic disaster? Astronomers, archeologists and biblical scholars investigate the possible science behind the myth. Two separate archeological sites along the Dead Sea claim to hold the remains of the actual sin cities. Newly discovered ancient artifacts may even hold the secrets to their destruction? Could an asteroid be responsible for the destruction of Sodom and Gomorrah?

A closer look at the beacon in the dark sky reveals an ever-present source of myth, intrigue, controversy and unsolved mysteries

Travel from the inner solar system to the Kuiper Belt and explore the moons surrounding the planets of the solar system. Many of these moons that were once unknown are now on the cutting edge of astronomical study.

When man finally broke free of the Earth's gravitational pull the dream of traveling to other planets became a reality. Today scientists are proposing a bizarre array of technologies in the hope of traveling faster through space, from space craft sporting sails that catch laser beams, to propulsion engines powered by a bizarre entity known as anti-matter.

A look at myths and mysteries concerning the universe. Includes a possibility that life can be sustained on Mars, an examination of time travel, and the theory of a Dark Star as a companion of our sun. Also, a closer look at the Big Bang theory.

Discover which is the largest planet, star, star cluster, constellation, black hole, volcano, galaxy, explosions, moon, storm, impact crater and void in space.

Experts cook up ways you could destroy the Earth, including swallowing it with a black hole, blowing it up with anti-matter, hurling it into the Sun, and switching off gravity.

What was the astronomical reality behind the star that, according to the Gospel of Matthew, guided the Magi to the young Jesus? This episode examines almost 20 centuries of theories, including meteors, novae, supernovae and comets…but is the truth to be found in a combination of astronomy–and astrology? Recent theories suggest that the "star" was the planet Jupiter in a series of conjunctions with other planets, stars and constellations, and that these conjunctions were interpreted by the Magi–astrologers and priests of the Zoroastrian religion–as heralding the birth of the Jewish Messiah.

Asteroids, comets, gamma ray bursts and the sun all combine to make the Earth a dangerous place to live. NASA's top brass and other scientists are arming themselves with the latest technology to pre-empt an apocalyptic attack. Watch and investigate bizarre, and terrifying apocalyptic scenarios and the ways that scientists are racing against the clock to develop technology to defend our planet.

Space colonization is no longer the fodder of sci-fi, it's becoming a reality. The efforts are underway to establish a colony on Mars, how they plan to grow food, recycle wastewater & introduce greenhouse gases to revive the Red Planet & make it habitable for us.

When mankind eventually leaves the cradle of Earth and ventures forth into the uncharted territories of the cosmos, where, and what form, will our new homes take? Will they be cities under glass, entrenched in distant alien soils? Will they be gleaming metropolises hanging in orbit above our heads, or in the lonely void of space? Will they be hollowed out asteroids, strip-mined for the valuables they horde? How will we grow food? What will the new era of spacesuits be like? The rovers that carry us around? Will robonauts, advanced robotic machines, perform the most dangerous tasks for us? How will we live... in space?

A look at asteroids and the impact they have or had on life now and before. Also, what spacecrafts can tell us about them, what they can do to civilization, and the possibility of living on one.

There have been both helpful and harmful effects on life on Earth from cosmic effects. Cosmic Phenomena includes the beauty of the Aurora Borealis and rainbows to the dangers of UV radiation and cosmic rays, from the miracle of photosynthesis to the thrill of a meteor shower as we explore the effects caused by the sun and other extra-solar sources, which can get under our skin and scramble man's technology, make life possible and be a threat to our existence all at once.

Without the moon, Earth would be a very different and desolate place today--four hours of sunlight with pitch-black nights, steady 100-mph winds spawning giant hurricanes that last for months, and virtually no complex life forms, much less humans. Safe to say, we probably owe our very existence to the moon. But what if it suddenly disappeared?

Outer space is already an essential part of America's ability to fight wars. Our military depends on satellites for many things, such as communications, reconnaissance and targeting information. But so far, no country has put weapons into space, although the U.S. and China have both shown they can shoot down satellites with ground-based missiles. If weapons do become a part of space, how will they work, how effective will they be, and what type of damage could they do? From ground-based lasers to telephone-pole sized rods hurtling from space at two miles per second to the far out weapons of the distant future, it's time to "lock and load" for Space Wars.

The Great Pyramids of Giza remain one of the enduring wonders of the ancient world. These mesmerizing monuments have eluded astronomers and archeologists for centuries. Why and how were they built? Were they merely burial tombs, or a cosmic vehicle to the celestial world? The world's renowned Egyptologists, astronomers and engineers join forces to solve some of the long-held mysteries about the pyramids. What were the motives and methods behind the orientation of the pyramids to face the four cardinal directions with extreme accuracy? Did the ancient Egyptians use the sun or nighttime stars in the orientation of the pyramids? Were the pyramids the pharaohs' portal to the nighttime stars? Or was the entire Giza complex built as a place of cult worship to the sun?

Asteroids and comets have left their imprint on planet Earth, literally. Since the turbulent formation of the solar system, these space rocks have continued to impact earth. Some have been so violent that they've led to mass extinctions. What's more, radical new theories suggest that asteroid and comet dust harbor deadly viruses that may have triggered some of our worst pandemics. The possibility of future cosmic collisions remains a legitimate threat. Yet, despite their dangers, asteroids and comets may hold vital natural resources, which could actually preserve mankind.

Could there be a monstrous, undiscovered star orbiting our own Sun? Could it be scattering killer comets throughout our Solar System like clockwork every 26 million years? New scientific surveys are probing the edges of our Solar System--a realm populated by giant worlds and mysterious planetoid--hunting for Nemesis, the Sun's purported evil twin. We may be on the verge of discovering this ultimate death star, suspected of causing every mass extinction in Earth's history. We employ everyday experiences to explain what Nemesis is and why it's been so hard to find. Experts start a wildfire on a dry California hillside, race a NASCAR around an oval track, and juggle fire, all in the effort to present how Nemesis works, and why life on Earth may depend on its discovery.