Cosmic Highway
From the search for extraterrestrials to the theory of black holes, this hit Discovery Channel series explores the intersection of current science and ancient mythology.
Return to the Red Planet
Is life on Mars really possible? The debate heats up with the discovery of a meteorite.
Target Earth
65 million years ago, an object just ten kilometers across wiped out all of Earth's dinosaurs.
At Home in the Galactic City
Our view outside of the Milky Way is shrouded by a fog of cosmic dust.
Pluto's Problems
What would it take to put a spacecraft on Pluto?
The Twin Hearts of Andromeda
Andromeda looks like a typical spiral galaxy, but astronomers suspect that our neighbor has two "hearts."
Nurseries in the Sky
Orion is a favorite of backyard astronomers.
Venus Unveiled
Venus has baffled generations of astronomers with an opaque shroud of clouds.
Dark Matters
The sky may appear to be full of stars, but 90 percent of "stuff" in the universe is invisible to us.
Taking the Sun's Pulse
Using the new science of helioseismology, solar patrollers are tuning into the sun's heartbeats.
Comet Hunters
"Cosmic Highway" tracks down Comet Hale-Bopp, the most distant comet ever discovered by amateur astronomers.
Monsters in the Middle
"Cosmic Highway" gets sucked into the theory of black holes.
Scaling the Universe
How do astronomers explain stars that appear to be at least fifteen billion years old?
Is Anybody Out There??
Are we wasting our time searching for intelligent life in the cosmos? It's a hot controversy.
