Alien Contact , Alien Contact , By sheer numbers, there may be life out there.
Anatomy of a Hurricane , Hurricane Intensity , What determines the strength of a hurricane? How do scientists determine which category it fits in?
Ancient Asteroid , Ancient Asteroid , Scientists research desert glass from the Sahara.
![Asteroid Alert , Asteroid Impact , The surface of planet Earth has a history of asteroid impacts.]()
Asteroid Alert , Asteroid Impact , The surface of planet Earth has a history of asteroid impacts.
Bermuda Triangle , Bermuda Triangle , Hear what critics believe happened to planes.
Big Bang , Why Energy Matters , Einstein revealed the relationship between energy and matter, unlocking the key to understanding how our universe formed.
Big Freeze , Big Freeze , Fossils reveal sudden climate changes.
![Birth of America , Oldest Rocks Ever Discovered , Canada's Northwest Territory is home to the oldest rocks yet discovered on Earth.]()
Birth of America , Oldest Rocks Ever Discovered , Canada's Northwest Territory is home to the oldest rocks yet discovered on Earth.
Birth of Life , Theories About Life's Beginnings , Scientists have proposed many theories for the origin of life on Earth. A celestial one is posited here.
Birth of the Earth , Earth Birth , Is it possible that our Earth once struck a planet?
Birth of the Oceans , Weighing Water , Did you know not all molecules of water are the same?
Bullets , Bullets , Explore the history and science behind ballistics.
Close Encounters , Close Encounters , A policeman becomes another believer.
Colliding Continents , Canyon History , The top of the canyon has fossils of ocean creatures.
Comets , Comets , Create a replica of a comet with earthly elements.
Dangers of the Deep , Sea Lab , Aquarius Research Lab is an underwater haven.
Deadliest Planets , Deadliest Planets , Search for flexible materials at low temperatures.
Death of a Star , Monster Dying Star , A dying star is hurtling through space, leaving a trail of glowing debris more than 13 light-years long.
Death of the Earth , Danger: Ice Age Ahead , The Earth is on track for another ice age -- will humans be able to survive?
Deep Space Probes , Space Probes , Probes use airbags to lessen landing impact.
Destructive Forces , Destructive Forces , The Niagara Falls are backing up.
Earth's Core , Earth's Core , Can the poles of the earth reverse?
Earth's Evil Twin , Vulnerable Venus , Venus and Earth were created around the same time -- so why is Venus barren and Earth thriving?
Earth's Invisible Shield , Magnetic Reversal of Fortune , Scientists agree that Earth has long been subjected to traumatic magentic reversals of the poles, and that we're due for another -- but when?
Explosive Force , TNT Explosions , TNT is faster and bigger than gun powder.
Extinctions , Extinctions , Can humans survive a wipeout?
First to Cross the Ocean , First Mariners , One theory on early oceanic colonies examines the role of the sexes to successfully populate a new colony.
Five Years on Mars , Rejuvenating Spirit , Winter is coming, but Spirit is trapped out of the sustaining light of the sun.
Giant Crystal Cave , Unlocking the Secrets , NASA scientist Chris McKay uses a Raman spectrometer to scan the crystals for clues to life on distant planets.
Glacier Meltdown , Glacier Meltdown , Sunlight and ice control the planet's temperature.
Grand Canyon , Spill-Over Theory , There are theories as to how the Grand Canyon came into being. Could it have been carved out by an emptying lake?
Great Lakes , Asteroid Hits Lakes , For thousands of years, the Great Lakes emptied into the Gulf of Mexico -- until a force from outer space changed everything.
![How the West Was Made , Scab Land , A strange geological phenomenon in the western United States reminded early settlers of torn flesh.]()
How the West Was Made , Scab Land , A strange geological phenomenon in the western United States reminded early settlers of torn flesh.
How to Kill a Planet , Anti-matter Bomb , Scientists investigate the merits of antimatter as a means to destroy planet earth.
Hubble's Amazing Universe UPDATE #1 , A Star is Born , Hubble's incredible photographs reveal how stars are born -- including our very own sun.
Hubble's Amazing Universe UPDATE #2 , Painting the Universe , When Hubble sends its incredible images to Earth, they are black & white; a year later, they glow with a rainbow of coded hues.
Hubble Trouble , Hubble Trouble , Watch a NASA team fix the Hubble Telescope.
Ice Age Meltdown , Ice Age Cycles , Three variables known as the Milankovitch Cycles affect how and when Earth enters an ice age or global warming.
Inside Hubble's Final Mission , Inside a Space Suit , A space suit is a complex construction that weighs up to 250 pounds -- but what really goes into one?
Journey to Jupiter , Jupiter's Mystery Moons , The probe Galileo has revealed great surprises about Jupiter's moons, and clues that may lead to the discovery of life.
Killer Asteroid , Killer Asteroid , An impact could trigger human extinction.
Landslides , Landslides , Southern California coastal hills slide away.
Lightning , Lightning , Strike survivors' brains operate differently.
![Living on the Moon , Moon Water , Maybe the moon has water. Maybe the moon has lots of water. How on earth will we get to it?]()
Living on the Moon , Moon Water , Maybe the moon has water. Maybe the moon has lots of water. How on earth will we get to it?
Loch Ness , Loch Ness , Discover how Nessie's lair was created.
![Mars Waterworld , Phoenix Parachute , Phoenix probe deploys parachute on Mars.]()
Mars Waterworld , Phoenix Parachute , Phoenix probe deploys parachute on Mars.
![Naked Science: Life on Mars , Mars Mission: Phoenix , The Phoenix lander is sent to Mars to search the arctic plains to find water.]()
Naked Science: Life on Mars , Mars Mission: Phoenix , The Phoenix lander is sent to Mars to search the arctic plains to find water.
Moon Mysteries , Moon Mysteries , Two planets collide to create the moon.
Naked Science: Alien Safari , Alien Life , Mars has been studied most in the search for life.
Naked Science: Death of the Universe , Cup o' Atoms , When the universe breaks, the darkness descends.
Naked Science: Dino Meteor , Dino Meteor , Is it possible that a meteor created the dinosaurs?
Naked Science: Hyper Hurricanes , Hyper Hurricanes , As Hurricane Andrew approaches Florida in 1992, an airplane heads into the eye of the storm.
Naked Science: Killer Lakes , Killer Lakes , High carbon dioxide levels kills off close trees.
Naked Science: Monster Black Holes , Monster Merger , The violent and beautiful collision of two black holes is happening all over the universe at this very moment.
Naked Science: Planet Storm , Planet Storm , Asteroids are tracked for probability of impact.
Naked Science: Ring of Fire , Ring of Fire , A marsh used to be a forest until the earthquake.
Naked Science: Stone Age Apocalypse , Stone Age , The need to cross territories developed language.
Pluto Rediscovered , Search for Far-Out Objects , Scientists discover objects in our solar system far beyond Neptune.
Pyramids , Pyramids , The Great Pyramid was aligned with due north.
Roman Tech , Roman Tech , The Pantheon's dome took technical ingenuity.
![Saturn's Secrets , Inside the Mission to Saturn , Dramatic moments behind the scenes of NASA's mission to Saturn.]()
Saturn's Secrets , Inside the Mission to Saturn , Dramatic moments behind the scenes of NASA's mission to Saturn.
![Secret World of Fireworks , Firework Designers , The Zambelli fireworks team puts on their finest performance for the fine citizens of Baltimore, MD.]()
Secret World of Fireworks , Firework Designers , The Zambelli fireworks team puts on their finest performance for the fine citizens of Baltimore, MD.
Shark Attacks , Shark Attacks , Why do sharks attack humans?
Solar Storm , Solar Storms , Scientists use data to create models of solar storms -- violent, dangerous, and more powerful than anything on Earth.
Supercontinent , Forecasting the Future , As the earth's crust shifts into a second Pangea, new weather patterns from the dominating ocean will wreak unprecedented havoc.
Super Diamonds , Man-Made Diamonds , Creating a diamond is the 20th century's alchemy -- but this time, it works.
Surviving Nature's Fury , Surviving Floods , Experience a test of just how powerful floods are.
Telepathy , Telepathy , Twins often claim they can share their thoughts.
The Deep , The Deep , Methane hydrate can burn in one's hand.
The Rockies , Rockies Thrust Up , The subduction of the Pacific plate beneath the North American plate caused the Rocky Mountains to rise up.
Time Machine , Ronald Mallett and Time Travel , Time travel theorist asks, What if we could send scientific information through time? Medical information -- a cure for AIDS?
Tsunami From Outer Space , Conflicting Theories , Clues from aboriginal mythology leads to different opinions on prehistoric geological phenomena.
Twister Outbreak , Tornado in a Can , If you can't bring the scientist to the tornado, bring the tornado to the scientist.
Volcano Alert , Volcano Alert , Find out one way people try to predict eruptions.
What's Sexy? , What's Sexy? , What female body type do men prefer in women?
What is Human? , What is Human? , Afarensis walked on two legs but wasn't human.
What Killed the Aztecs? , Deadly Mutation , Under Spanish rule, Aztecs labored in the fields, bringing a new virus into their squalid homes.
Who Built Stonehenge? , Ancient Rocks , The builders of Stonehenge had to be innovative.
Alien Contact,A crop circle is a pattern formed by flattening crops. The explanation of crop circles is widely disputed.
Anatomy of a Hurricane,Hurricane Katrina's progression is observed by the Terra satellites.
Ancient Asteroid,Tutankhamun's Pectoral with desert glass scarab, Egyptian Museum, Cairo, Egypt.
Angry Earth,A group of firefighters hold the hose to battle a fire.
Angry Skies,Join the scientists at the frontlines, and see the latest weapons in the battle against these Angry Skies.
Asteroid Alert,Peter Schultz looking at sample of the Carancas meteorite under a microscope.
Atlantis,A researcher looking for Atlantis in front of archaeological dig.
Bermuda Triangle,Dock into the waters surrounding the Bermuda islands.
Big Bang,Graphic simulation of detection of Z boson decay in CMS (Compact Muon Solenoid) Detector at CERN in Geneva, Switzerland.
Big Freeze,Bear Meadows: This region of Pennsylvania is covered with evidence of the last ice age.
Birth of America,Denver city with Rocky Mountains behind.
Birth of Life,Geysers at Sol de Manana, Altiplano, Bolivia.
Birth of the Earth,Martin Van Kranendonk amongst microbe-rich stromatolite reefs, one of the first sources of oxygen on Earth, at Carbla Point Western Australia.
Birth of the Oceans,Steam from Caldera.
Birth of the Solar System,Image of the death of a star as taken by the Spitzer Space Telescope.
Birth of the Universe,The sun sets at the Paranal Observatory, Chile.
Bullets,The barrel of a revolver is shown.
Close Encounters,Dr. Rosalba Bonaccorsi of the University of Trieste, Italy, collects samples of sand from the Mojave desert for the study of microbial life in an extremely dry environment.
Colliding Continents,The striking landscape of the Grand Canyon.
Comets,Comets on the edge of the solar system head towards the sun.
Dangers of the Deep,Troll A, inside the leg of the gas platform.
Deadliest Planets,Clouds around the Keck Observatory.
Death of a Star,Atmospheric photograph of the salt ponds.
Death of the Earth,Dry, cracked Earth and dead plants.
Death of the Sun,Big Bear Solar Observatory in the San Bernardino Mountains in California.
Deep Space Probes,Huygens probe landing site on Titan.
Destructive Forces,Niagara Falls viewed from above.
Earth's Core,Sailing near Boston.
Earth's Crust,Professor Peter Schultz examines the damage in a perspex sample from an impact cratering experiment.
Earth's Evil Twin,Hot metal being poured at Fedde Bronze Works.
Earth's Invisible Shield,The Manicouagan Impact Crater reservoir in Quebec, Canada.
Explosive Force,Illustration of Little Boy Atomic Bomb.
Extinctions,The Gorgonopsians died out in the greatest mass extinction the Earth has ever know.
First to Cross the Ocean,Cave looking out at sea.
Five Years on Mars,Rover Spirit explores the Columbia Hills after traveling through a desert of broken lava.
Freeze Me,A cryo-biologist who is a critic of cryonics Arthur Rowe is a governor of the society of cryobiology.
Giant Crystal Cave,Main street in Chihuahua, Mexico where the Naica Mines are located.
Glacier Meltdown,Ice sample polarized.
Grand Canyon,The eastern end of the Grand Canyon.
Great Lakes,Satellite image of Great Lakes from space.
How the West Was Made,Ryan Crow chipping off basaltic rock from the Grand Canyon Toroweap Ridge.
How to Kill a Planet,Geoscientist Dr. Dan Durda from the Southwest Research Institute in Boulder, Colorado describes the impact of a small asteroid impacting the earth.
Hubble's Amazing Universe,Dr. Adam G. Riess' research involves measurements of the cosmological framework with supernovae (exploding stars) and Cepheids (pulsating stars).
Hubble's Amazing Universe UPDATE #1,More than a celestial mechanic, John Grunsfeld is a PhD astronomer and an astronaut on his fourth servicing mission to Hubble.
Hubble's Amazing Universe UPDATE #2,Dr. Adam G. Riess' research involves measurements of the cosmological framework with supernovae (exploding stars) and Cepheids (pulsating stars).
Hubble Trouble,Centrifuge at Goddard Space Center.
Ice Age Meltdown,Archaeologists Dr. Jim Adovasio and Dr. David Madsen outside Danger Cave, Utah. They are dressed in high-tech suits preparing to enter the cave to collect fecal matter to investigate the lives of the people who lived in the Great Basin at the end of the Ice Age.
Inside Hubble's Final Mission,John Herrington in a suit used for space walks.
Journey to Jupiter,Jupiter and it's four main moons: Io, Europa, Ganymede and Callisto.
Landslides,Graphic of magma causing landslide.
Lightning,Wire-frame illustration inside the body focusing on the blood and muscles.
Loch Ness,Adrian Shine stands on the Deepscan boat.
Mars Waterworld,Artist's conception of a Mars Exploration Rover.
Naked Science: Life on Mars,Artist's Conception of the Phoenix Lander.
Moon Mysteries,The sun shines in Acadia National Park.
Naked Science: Polar Apocalypse,Glaciers in Glacier Bay National Park.
Naked Science: Prehistoric Americans,John M. Erlandson explains the importance of kelp in understanding how people could have migrated to the Americas around the pacific coast.
Naked Science: Alien Safari,Salt flats seen in Death Valley, CA.
Naked Science: Comet Mysteries,Comet exploding.
Naked Science: Death of the Universe,Dr. Richard Ellis of the California Institute of Technology in front of the W.M. Keck Observatory on the summit of Mauna Kea.
Naked Science: Dino Meteor,Dinosaur skull in museum.
Naked Science: Hyper Hurricanes,CGI of a hurricane storm on the surface of the earth.
Naked Science: Killer Lakes,Yellowstone Lake.
Naked Science: Monster Black Holes,Illustration of the core of a supernova.
Naked Science: Ring of Fire,Brian Atwater looking for tsunami deposits in bank of estuary.
Naked Science: Stone Age Apocalypse,Cambridge professor Howard Griffiths conducting botany experiment.
Pluto Rediscovered,CGI of New Horizons spacecraft flying by Jupiter.
Pyramids,Map of Egyptian tombs.
Roman Tech,The Colosseum at night, the largest amphitheater in the Roman world.
Saturn's Secrets,Saturn and its rings which create a shadow on the planet's body taken from Cassini.
Secret World of Fireworks,CU Ignition wires sparking at Zambelli Internationale.
Solar Force,The SOHO mission in flight. It's main purpose is to study the sun's internal structure.
Solar Storm,An image taken from SOHO (Solar and Heliospheric Observatory) Extreme Ultraviolet Imaging Telescope that shows a widely spreading coronal mass ejection (CME) as it blasts more than a billion tons of matter out into space at millions of kilometers per hour.
Spacemen,Professor Jeffrey Hoffman now works on new astronaut technology at MIT.
Supercontinent,Dr. Bruce Tiffney in cactus garden.
Super Diamonds,Jim Davidson, Technical Director of Petra Diamonds, inspects one of the vast processing areas of the Cullinan Diamond Mine in Gauteng, South Africa.
Super Volcano,The heat emitted off an active volcano is measured.
Surviving Nature's Fury,A rescue worker plods through a flooded river.
Telepathy,Some telepathic powers are believed to reside in twins.
The Deep,Mike Garcia, volcanologist from the University of Hawaii, demonstrates how the Hawaiian Islands are sinking into the Earth's crust.
The Rockies,Canadian Rocky Mountains in British Columbia, Canada.
Time Machine,Dr Michio Kaku at the top of the Empire State Building explaining that time is the 4th dimension.
Tsunami From Outer Space,Recreation of Aboriginal dancers at sunset on Morning Island in Australia.
Tsunami Warning,Coral chopping in Indonesia with scientist Kerry Sieh.
Twister Outbreak,A wide-track tornado at sunset.
Volcano Alert,Kilauea close up.
Was Darwin Wrong?,Could peacock feathers disprove Darwin?
What's Sexy?,The Ice House.
What Killed the Aztecs?,Bristish Virologist Professor John Oxford with model of the influenza virus.
Who Built Stonehenge?,Stonehenge in early dawn with fog surrounding.
