An investigation into the secret networks of curators and dealers who profited off Nazi-looted art. The decades-long war crime of stealing Jewish masterpieces has never been fully exposed or resolved. Part Two.

Scientists track down the earliest known bubonic plague victims and study the virus in hopes of preventing future outbreaks while the societal impact of the plague is also considered.

Scientists track down the earliest known bubonic plague victims and study the virus in hopes of preventing future outbreaks while the societal impact of the plague is also considered.

An investigation into the secret networks of curators and dealers who profited off Nazi-looted art. The decades-long war crime of stealing Jewish masterpieces has never been fully exposed or resolved. Part Two.

Scientists track down the earliest known bubonic plague victims and study the virus in hopes of preventing future outbreaks while the societal impact of the plague is also considered.

Amateur archaeologist Philippa Langley, who discovered Richard III's remains, searches for what really happened to his two nephews who, legend has it, he had murdered.

Amateur archaeologist Philippa Langley, who discovered Richard III's remains, searches for what really happened to his two nephews who, legend has it, he had murdered.

Amateur archaeologist Philippa Langley, who discovered Richard III's remains, searches for what really happened to his two nephews who, legend has it, he had murdered.

There are only two accepted representations of William Shakespeare that are considered "official," but could a portrait that has been hanging over a family's mantelpiece for the last 50 years be the third? British window washer Steven Wadlow, whose father bought the portrait in the 1960s, is on the hunt to prove the painting is indeed genuine. If so, it could be worth as much as $200 million.

There are only two accepted representations of William Shakespeare that are considered "official," but could a portrait that has been hanging over a family's mantelpiece for the last 50 years be the third? British window washer Steven Wadlow, whose father bought the portrait in the 1960s, is on the hunt to prove the painting is indeed genuine. If so, it could be worth as much as $200 million.

There are only two accepted representations of William Shakespeare that are considered "official," but could a portrait that has been hanging over a family's mantelpiece for the last 50 years be the third? British window washer Steven Wadlow, whose father bought the portrait in the 1960s, is on the hunt to prove the painting is indeed genuine. If so, it could be worth as much as $200 million.

There are only two accepted representations of William Shakespeare that are considered "official," but could a portrait that has been hanging over a family's mantelpiece for the last 50 years be the third? British window washer Steven Wadlow, whose father bought the portrait in the 1960s, is on the hunt to prove the painting is indeed genuine. If so, it could be worth as much as $200 million.

Follow forensic anthropologists as they excavate the early American colony and uncover dark secrets. What do the newly discovered bones of a 14-year-old English girl reveal about what really happened during the winter of 1609?

Follow forensic anthropologists as they excavate the early American colony and uncover dark secrets. What do the newly discovered bones of a 14-year-old English girl reveal about what really happened during the winter of 1609?