Blind since birth, Michael Hingson relied on his guide dog Roselle to lead him down 78 floors of the North Tower during the 9/11 terrorist attacks — and she did.

After 16-year-old Emma Walker broke up with her boyfriend Riley Gaul, he eventually grew enraged enough to kill her — then posted a message on Twitter to cover his tracks.

Before she was a Golden Girl, young Betty White found work in radio and on "The Mary Tyler Moore Show" — setting the stage for one of the most impressive show business careers in history.

In the final weeks of the Vietnam War, Operation Babylift evacuated more than 3,300 South Vietnamese orphans and placed them with adoptive families in the U.S. — but the first flight ended in tragedy.

Amou Haji of Dejgah, Iran claimed that cleanliness causes illness and that his avoidance of bathing was the reason he managed to live to 94 without any major health problems.

These electron microscope images show what life is like in the invisible world of viruses, bacteria, and pollen — and it’s both surreal and spooky.

On July 3, 1969, Brian Jones drowned in his pool and died at just 27, but questions still linger about what really happened at his Cotchford Farm home that night.

In the early morning hours on November 13, 1974, Ronald DeFeo Jr. killed his entire family in cold blood — and claimed that demonic voices told him to do it.

Isidor and Ida Straus were a well-to-do German-American couple who passed up seats on lifeboats and instead chose to stay together on the RMS Titanic as it sank on April 15, 1912.

Mother Love Bone singer Andrew Wood was beloved among Seattle's alternative rock scene — then died of an overdose at age 24 just before his band's debut album came out.

From the unknown woman found dismembered in three suitcases in Pennsylvania to the "Lady of the Dunes" of Cape Cod, go inside history's most baffling cold cases.