Mystery of Planet 9

Astronomers dig in to speculate what a mysterious ninth planet that's lurking in the outer reaches of the solar system might be like.

Black Holes: The Secret Origin

Supermassive black holes can devour stars and can even shape galaxies. We're now studying recent black hole collisions and examine how these gigantic mysteries get so large.

Secret History of Pluto

Scientists reveal the secret internal ocean hiding below Pluto's surface that could support life despite being four-billion miles away from the sun.

Stars That Kill

We're counting down NASA's top six most-wanted stars worthy of any sci-fi film.

The Universe's Deadliest

We're sending a space ship full of crash test dummies to explore the deadliest hot spots in the cosmos.

Life and Death on the Red Planet

Technological innovations are revealing that despite having to endure violence and other catastrophic events, Martian life continues to bounce back.

The Dark Matter Enigma

Scientists know that dark matter has been vital to our universe since its birth, but many mysteries remain. New discoveries reveal that it could create black holes, cause mass extinctions and maybe even shape life on Earth itself.

Strangest Alien Worlds

Astronomers research strange new planets that vary differently from the Earth we know.

Are Black Holes Real?

New discoveries are challenging what we know about black holes, with some astronomers even questioning if they exist. The latest science tries to explain how they work and what they look like, even though no one has ever seen one.

Twin Suns: The Alien Mysteries

We're checking out binary star systems in our galaxy to find out if the conditions they create are better than the single-star system we know.

Dark History of the Solar System

We're uncovering the dark history of how Earth came to be a planet made from the wreckage of ancient worlds before us.

The Quasar Enigma

We're researching the bright, powerful and mysterious world of quasars -- the brightest objects in the universe.

Uranus and Neptune: Rise of the Ice Giants

We're digging into new research that suggests ice giants Uranus and Neptune may have helped kickstart life on Earth.

Secret History of Mercury

We're learning how Mercury -- the closest planet to the sun -- could threaten our existence on Earth.

Strange Lives of Dwarf Planets

We're traveling to a number of dwarf planets to uncover their secrets -- from oceans of liquid water on ex-planet Pluto to vanishing volcanoes on icy Ceres.

War on Asteroids

Scientists reveal new technology designed to prevent an asteroid from hitting Earth and causing an apocalyptic scene.

Mystery of Spacetime

We're learning how spacetime has been expanding since the beginning and will ultimate end our universe.

Nightmares of Neutron Stars

Neutron stars are strange and violent phenomena that defy the laws of physics, and new discoveries reveal that these bizarre nightmares are far more deadly than we ever thought, with the power to destroy planets and other stars.

When Supernovas Strike

Supernovas are the violent death of giant stars, and new discoveries reveal that these cataclysmic events create the elements that are essential to all life in the universe.

The Interstellar Mysteries

New discoveries reveal that the space between the universe's stars is not empty and unremarkable as previously thought, but filled with weird objects and strange phenomena that might hold the darkest secrets of our cosmos.

How Black Holes Made Us

Black holes aren't the violent monsters we think they are, and new discoveries reveal that they might have been essential to creating stars, giving light and building the universe itself.

Secret World of Nebulas

Nebulas are the strange structures of cosmic gas and dust where stars are born and die, and new discoveries reveal the secrets of these mysterious places.

Did the Big Bang Really Happen?

Some astronomers question if the Big Bang really happened, and using the latest science, they investigate if it wasn't just the start of our universe, but many mysterious multiverses.

Battle of the Dark Universe

Dark matter and dark energy are locked in an epic battle for control of the cosmos, and the winner will determine the fate of the universe. New discoveries might reveal which force will emerge victorious.

Hunt for Alien Life

The latest discoveries suggest that we might be on the verge of discovering life beyond our planet. Scientists are investigating if Earth's life began elsewhere in the universe, and whether we need to evolve to know for sure.

Finding the New Earth

Thousands of exoplanets lie beyond our solar system, and some resemble Earth enough that one could be a new home for humanity. But even with cutting-edge technology, finding the perfect one is the scientific challenge of the age.

Cassini's Final Secrets

NASA's Cassini spacecraft revealed the strange secrets of Saturn until it vaporized in its atmosphere in a blaze of glory. But today its legacy lives on, as fresh data from the probe helps scientists make brand-new discoveries.

Asteroid Apocalypse: The New Threat

If a massive asteroid collides with Earth, it could end life on the planet as we know it. New discoveries and cutting-edge tech reveal how close the planet is to apocalypse and what it would take for the world's leading space agencies to stop it.

NASA's Journey to Mars

NASA is on a mission to send humans to Mars within just 15 years, but to reach this next frontier of space exploration, experts must discover brand-new technology and cutting-edge science that protects astronauts from the Red Planet's deadliest killers.

Hunt for Alien Evidence

The discovery of extraterrestrial life might face an impossible challenge -- the physics of the universe itself. Using cutting-edge tech, however, experts might be on the verge of a groundbreaking find -- and the evidence could already be in hand.

Death of the Last Stars

The universe's stars are dying off faster than new ones are being born. Using the latest technology, experts investigate the secrets of the last stars of the cosmos and what this stellar apocalypse means for life on Earth.

Secrets of Time Travel

Time travel is a staple of science fiction, but could it ever be science fact? By investigating the possibilities for time travel, scientists are tackling some of the toughest questions in physics and revealing the true nature of space and time itself.

When NASA Met Jupiter

NASA's Juno spacecraft is part of a cutting-edge mission to explore the mysteries of Jupiter, and as this mighty probe is pummeled with deadly radiation, it gathers new data that could change everything we know about the solar system's biggest planet.

Edge of the Universe

Does the universe have an edge? It's one of the deepest mysteries in science and scientists are probing the cosmos for answers. The search for an edge involves a journey to the deepest reaches of space, to the beginning of time and onward to infinity.

Monsters of the Milky Way

A journey to the center of the Milky Way reveals powerful streams of million-degree gas, dangerous flares bursting from the supermassive black hole at the galactic core and swarms of black holes that could threaten Earth's existence.

Earth's Death Orbit

As the world spins on its tilted axis and wobbles as it orbits the sun, it's also careening through the Milky Way. Every part of this voyage shapes life, from creation to extinction, and could end in the Earth being ejected out of the galaxy altogether.

Journey to a Black Hole

Journey to the heart of the M87 supermassive black hole, the first and only black hole ever photographed, and explore the mystery of how it grew so large, what lies inside and how it controls the entire galaxy.

Mission to a Comet

The Rosetta mission was a ground-breaking expedition to land on a comet for the very first time; special access reveals what this cutting-edge journey discovered and how these mysterious objects helped create life on Earth.

Secrets of the Sun

A brand-new NASA mission to the Sun reveals cutting-edge discoveries about Earth’s star; as the Parker Solar Probe dives through the Sun’s atmosphere, what it finds challenges everything we know about this strange place.

Aliens of the Microcosmos

The hidden kingdom of microscopic alien organisms shapes the universe as much as galaxies, stars, and planets; new discoveries reveal how bacteria, viruses, and other alien micro-organisms built life on Earth and influence humanity’s future in the cosmos.

Curse of the White Dwarf

White dwarfs are small, dead stars with a dangerous side, capable of exploding into supernovas and destroying planets; new research suggests these mysterious phenomena may be the key to understanding the universe itself.

War of the Galaxies

Galaxies are locked in continual combat across the universe, and our own Milky Way will face its biggest opponent ever, the Andromeda Galaxy, in a titanic and deadly struggle that could create a new and unrecognizable super galaxy.

The Next Supernova

Our galaxy is full of stars ready to explode into supernovas, a stellar detonation powerful enough to destroy all life on Earth; it's an event that hasn't occurred in 400 years, and the search is on to locate which star may be next.

Secret Lives of Neutrinos

Neutrinos are the most mysterious particles in the universe, and they power some of the most explosive events in the cosmos; new discoveries reveal how these ghosts pass through objects undetected and why they could be the reason we exist.

Birth of the Monster Black Holes

New discoveries reveal an astonishing supermassive black hole that was born during the earliest days of the cosmos, and finding out how this giant grew so large so quickly may help to explain the very formation of the universe itself.

Gravitational Waves Revealed

Gravitational waves are helping scientists explore the cosmos in revolutionary, new ways, and the discoveries they make are revealing the universe's greatest mysteries.

Mystery of Alien Worlds

An explosion in the discovery of exoplanets is challenging everything we know about our universe; experts use cutting-edge astronomy to investigate these mysterious alien worlds and how they defy the laws of physics.

Secrets of the Cosmic Web

New astronomical research is beginning to reveal an invisible scaffold of dark matter known as the Cosmic Web, an intergalactic network that transformed the Universe from a chaotic Big Bang into the structured beauty of the present day cosmos.

Curse of the Cosmic Rays

Cosmic rays capable of destroying human DNA are hurtling through outer space like subatomic bullets, and in order to protect space crews from radiation damage, physicists are attempting to determine where these deadly particles originate in the universe.

Hunt for Dark Matter

Dark Matter is thought to be the cosmic glue that holds the universe together, yet the search for it continues to eluded scientists today; now, physicists have developed dozens of theories to determine if this mysterious substance could actually exist.

Dark History of Earth

Earth's history is marked by one cosmic disaster after another, forging the path of human evolution; now, experts explore how the Earth has teetered on the verge of destruction, and how chaos and catastrophe may be vital ingredients for a living planet.

Hunt for the Universe's Origin

Determining the age of the universe continues to be an elusive endeavor for scientists as their results are conflicting, and without a definitive answer, everything that's known about the cosmos, from the big bang to gravity, could be completely wrong.

Voyager's Ultimate Mission

The two Voyager spacecraft have travelled farther than any human-made object in history, and as they reach interstellar space, experts explore their most astonishing discoveries and how their extended operation has transformed into the ultimate mission.

The Moons of Saturn

With more than 80 moons, Saturn could be the most dynamic planetary system in our cosmic neighborhood, and with giant underground oceans and protective magnetic fields, experts explore how these satellites could rewrite the rules of the Solar System.

A Robot's Guide to Mars

Mars is infested with robots, orbiting the planet and roaming the Martian surface on a mission to uncover its secrets. Now, Perseverance joins this dedicated group of machines to uncover if there is, or was there ever, life on the Red Planet.

Most Violent Event in the Universe

The collision of two supermassive black holes is the most violent event that can occur in the universe, and now, experts explore where a black hole's energy originates and what really happens when the two most powerful objects in the cosmos clash.

Asteroid: Countdown to Catastrophe

The year is 2029. An asteroid the size of a city block hurtles towards the US at 40,000 mph that will reduce New York to ashes. Now, experts confront the story of this fictional asteroid event to determine what could happen, and how it might be stopped.

Solar System Special

New discoveries have rewritten the history of our solar system, revealing a complex and violent story that begins with the birth of our Sun from the debris of a massive galactic collision, to its eventual fate as a lone zombie star.