New evidence suggests that many of Leonardo da Vinci's ideas can be traced to other scientists, as far back as 1,700 years.
Underwater secrets reveal a seaside city where Nero and Julius Caesar once lived.
Details about the night of Dec. 23, 1888, when Vincent van Gogh cut his ear in the town of Arles, France.
Scientists try to determine which animal was the apex predator 58 million years ago -- a 43-foot-long snake called the titanoboa or a giant crocodilian.
Researchers working in secret inside a quarry study the charred remains of an English settlement that dates back 3,000 years.
Scientists explore royal tombs beneath an ancient Mexican city, which may reveal clues about the Teotihuacan culture and its people.
Dr. Kathleen Martinez searches for Cleopatra's lost tomb in a 35-meter deep underground shaft.
Scientists theorize that the three men who escaped Alcatraz in 1962 may have been able to survive, contradicting the original thought that they perished at sea.
Forensic anthropologists excavate the early American colony of Jamestown, Va., and find bones of a 14-year-old English girl.
Scientists uncover deviant burials dating back to medieval England which may offer insight into the reasons for the formation of myths about vampires.
Archaeological evidence may explain how ancient Greeks got inside Troy.
Human skeletal remains found in the basement of Ben Franklin's British residence may have been used for science.
Scientists test the bones of England's fierce King Richard III.
Art historians and other specialists examine an earlier version of Leonardo da Vinci's Mona Lisa.
Where the Hanging Gardens of Babylon were located, what they looked like and how they were constructed.
Scientific evidence suggests Carthaginians fleeing the Romans may have taken refuge in South America.
New forensic technology helps researchers study Dr. David Livingstone's lost diary, which reveals he witnessed the massacre of slaves by their traders.
Reporting from Dallas and the New York CBS Newsroom the day President John F. Kennedy was shot, including Walter Cronkite's emotional announcement that the president had died; Dan Rather, Bob Schieffer, Marvin Kalb and Marianne Means.
Historian Charles Allen investigates whether ash and bone discovered in Northern India in 1898 are remains of the Buddha.
New scientific research provides insights into how King Tutankhamen was buried, why his tomb remained intact and how he died.
Scientists say some of the 49,000 year-old Neanderthal bones discovered in El Sidrón, Spain, bear signs of cannibalism.
Forensic and scientific analysis help determine how 57 Irish immigrants died less than two months after arriving in Pennsylvania to work on the railroad.
German POWs reveal inner thoughts about the Third Reich, including military secrets that helped the Allies win World War II.
An officer aboard a Soviet submarine refuses to fire a nuclear torpedo during the Cuban Missile Crisis in 1962.
American and Soviet scientists engage in a dangerous race to build and detonate the world's largest bomb.
More than 2,000 years ago the Chinese produced 8,000 painted terracotta warriors.
Col. Percy Fawcett disappeared in 1925 while searching for an ancient lost city in Brazil.
Five ancient Roman ships sit upright and intact on the seabed of the remote Italian island Ventotene.
Although slaves overpower the Dutch crew on the Meermin, the ship ends up wrecked on a beach 200 miles east of Cape Town.
The royal tomb of Pharaoh Psusennes I was discovered in 1939, filled with jewels and treasure.
The Battle of Stalingrad resulted in the loss of more than one million lives and changed the course of World War II.
Fearing Germany would seize the French fleet, and thereby invade Britain, Winston Churchill decides to have the fleet destroyed.
Japan creates an aircraft carrier submarine to attack the U.S. and blow up the Panama Canal.
Modern consumer technology enabled terrorists to coordinate and plan bombings in Mumbai in 2008.
A U.S. bomber crew shot down over the jungles of Japanese-occupied Borneo during World War II is rescued by Dayak tribesmen.
Art historian Antonio Forcellino has found evidence that Michelangelo was involved with a group trying to reform the Catholic church.
Marine archeologists discover and excavate the 300-year-old wreck of Queen Anne's Revenge, the pirate Blackbeard's flagship.
New evidence raises questions about the conviction of Hawley Crippen, accused of poisoning and dismembering his wife in 1910.
The rise and fall of the Minoan civilization on the island of Crete.
The rise and fall of the Minoan civilization on the island of Crete.
During the 1970s, East German athletes, some as young as 12, were forced to take untested steroids and male hormones.
Two Slovak Jews were the first to escape from the Auschwitz death camp and relay to the world the Nazi extermination plan being being carried out there.
A new discovery outside Mexico City sheds light on the violent relations between the Aztecs and the Conquistadors.
The voyage of the Catalpa was a covert rescue mission to facilitate the escape of six Irish political prisoners.
Thirty decapitated Roman bodies found in York sparks an intense investigation.
Scientists piece together how Pompeii's sister city, Herculaneum, was buried by the eruption of Vesuvius in 79 AD.
A group of men sets out to bring the Scriptures to people in their own language, launching a religious revolution that changes the course of history.
A re-creation of the dogfight between one American and one Japanese pilot who faced each other over the Pacific in the summer of 1942.
Evidence may reveal the workings of the umbrella gun, used by the KGB to murder a Bulgarian dissident, and who pulled the trigger.
The 1956 sinking of the Andrea Doria; why divers have died exploring the wreck; details of a possible cover-up.
Female convicts set up a lucrative business, offering themselves to sailors on a ship sailing from London to Australia in 1789.
Joseph "Big Joey" Massino cooperates with FBI agents, violating the vow of silence keeping the Mafia in power; Liev Schreiber narrates.
Host Liev Schreiber narrates an account of the race to capture Germany's top scientists during the waning days of World War II.
Discovery of female remains leads to theories about the Amazon warriors.
How the Allied invasion, which included almost 7,000 ships, 160,000 soldiers 17,000 paratroopers and 3,000 planes, resulted in victory on June 6, 1944.
Evidence that helps prove the Turin Shroud is indeed 2,000 years old, dating back to the time of Jesus Christ.
Modern scientists are trying to determine the cause of the 1918 flu pandemic that killed millions of people.
Interviews, modern science, reconstructions and archival footage depict the construction and destruction of Thailand's River Kwai railroad during World War II.
An investigation targets the creation, testing and deployment of bombs designed to destroy dams to impede German steel production during World War II.
Scientist Susan Solomon reconstructs the Robert F. Scott's journey to the South Pole using meteorological data, satellite imagery and expedition accounts.
Historical investigation and modern forensic analysis examine the origins of the 64 A.D. fire in Rome.
Dr. Ryan Parr and a team of scientists use DNA to try to identify 43 bodies recovered from the Titanic.
Geneticist Steven O'Brien travels to an English town where a genetic mutation made some immune to the black plague that ravaged medieval Europe.
A team of scientists claim fossilized bones discovered in Kenya during a 2000 excavation are the oldest direct ancestor to humankind.
Archaeologists attempt to learn the origin of syphilis and disprove theories that link it to the Carib Indians met by Columbus and his followers.
Researchers Martin Biddle and his wife, Birthe Kjolbye-Biddle, try to determine if Jerusalem's Church of the Holy Sepulchre is the site of Jesus' tomb.
Archaeologists reconstruct the Battle of Isandlwana in which the Zulu army handed the invading British troops their worst Victorian-era defeat.
Archaeologists rethink traditional theories regarding the extermination of the New World colony after discovering evidence of disease, warfare and poisoning.
When an ancient body is found in a shallow grave at Stonehenge, archaeologist Mike Pitts investigates the cause of death.
A psychologist searches for a scientific explanation for the behavior of the accused during the Salem witch trials of 1692.
Recent findings by paleoanthropologist Christy Turner link the disappearance of the Anasazi around 1200 A.D. to cannibalism, a claim that has stirred fierce debate.
A hydrogen specialist tries to explain what happened to the Hindenburg; a paleoanthropologist believes the Anasazi culture involved cannibalism.
A hydrogen specialist tries to explain what happened to the Hindenburg.
Archaeologists and forensic anthropologists investigate what may have happened to a Viking colony.
A devastating volcanic eruption in A.D. 535 leads to the emergence of new nations and religions.
Researching a climatic catastrophe that rocked the Earth in A.D. 535, causing two years of darkness, famine, drought and disease.