NASA Viking Project
Watch this video about the Viking Project on HowStuffWorks. This Destination Tomorrow Segment describes the first mission to land a spacecraft safely on the surface of another planet. Learn how the Viking Project works in this video from NASA's Destinatio
Most Watched in Modern Era
Assignment Discovery: Martin Luther King Jr
Martin Luther King Jr. was a key figure in the fight for civil rights until his tragic death. Learn more about Martin Luther King Jr. and the civil rights movement on Discovery Channel's "Assignment Discovery."
Conspiracy Test: RFK Autopsy
On Discovery Channel's "Conspiracy Test," Los Angeles coroner Dr. Thomas Noguchi's controversial autopsy report debunked the LAPD's open and shut lone gunman case in the assassination of Robert F. Kennedy.
Best Evidence: TWA Flight 800 CIA Animation
Did the FBI, National Transportation Safety Board and the CIA attempt to mislead the public about the explosion of TWA Flight 800? A researcher explains why he thinks the official CIA animation doesn't hold water on Discovery Channel's "Best Evidence."
Assignment Discovery: Malcolm X
While in prison, Malcolm X experienced a religious awakening and decided to devote himself to the Nation of Islam. Learn more about Malcolm X on Discovery Channel's "Assignment Discovery."
Conspiracy Test: RFK Autopsy Debate
From the bullet trajectory to gunpowder burns, the veracity of Dr. Thomas Noguchi's autopsy report on the assassination of Robert F. Kennedy is examined on Discovery Channel's "Conspiracy Test."
Best Evidence: Foul Play in TWA Flight 800
Was foul play to blame for the crash of TWA flight 800? After an extensive investigation, an FBI investigator offers his viewpoint on Discovery Channel's "Best Evidence."
Best Evidence: TWA Missile Theory
Did the US Government attempt to conceal the real cause of the TWA Flight 800 explosion? Discovery Channel's "Best Evidence," presents alternative theories such as a possible missile strike that challenge the official report.
Best Evidence: TWA Medical Evidence
Can medical evidence shed light on the explosion of TWA Flight 800? Discovery Channel's "Best Evidence" probes an expert for his analysis of the biological evidence.
Conspiracy Test: RFK Autopsy Analysis
RFK's autopsy reveals that he was shot from behind. Due to the distance and location, witnesses report that alleged gunmen Sirhan Sirhan could not have inflicted the fatal wound. Learn more on Discovery Channel's "Conspiracy Test."
Best Evidence: TWA Flight 800 Friendly Fire
Could the explosion of TWA Flight 800 have been caused by friendly fire? Discovery Channel's "Best Evidence," explores the possibility of an accidental navy strike with skeptics of the official government explanation.
Best Evidence: TWA Flight 800 Physical Evidence
On Discovery Channel's "Best Evidence," once the wreckage from TWA Flight 800 was reconstructed, investigators ruled out the possibility of a missile strike and shifted its focus to a center fuel tank explosion.
Recent Videos in Modern Era
American Heroes and Heroines: Sgt. David Brown
Sergeant David Brown was injured in battle twice before returning home at Walter Reed Medical Center. After seeing the struggles his fellow veterans faced he has since made volunteering his full-time job.
Dogs 101: Ronald Reagan
President Reagan was a little overwhelmed with his dog, Lucky the Bouvier de Flandres. As Lucky grew, he gave the President a run for his money ... literally. Then came Rex, the Cavalier King Charles Spaniel.
No Dog Left Behind: Friend for Life
In battle, fallen soldiers are never left behind. Once these dogs become part of the family, the soldiers can't bear to leave them in Iraq once they go home.
No Dog Left Behind: How Lava Found Me
One morning a soldier awakes to find something crawling in his sleeping bag. With visions of the dreaded camel spider he looks down to see the face of Lava, an orphan puppy, who then licks his face.
Little People Big World: Return To Iraq
Matt is returning to Iraq to care for an Iraqi family with three children who have dwarfism and are in serious need of health care. Watch this video from TLC's "Little People, Big World."
Little People Big World: Going To Iraq
Matt Roloff prepares for his trip to Iraq and learns the dangers may be greater than he originally estimated. Watch this video from TLC's "Little People, Big World."