Robert Plympton's DNA was matched to samples found at the scene of Barbara Mae Tucker's murder more than four decades ago.

The geyser at Fly Ranch in Nevada is a unique, rainbow-colored geologic wonder — and it formed by complete accident.

After struggling with severe drug and alcohol addiction since the age of 13, Cory Monteith died tragically on July 13, 2013.

Trace evidence of plants found on obsidian blades from Rapa Nui suggests the island maintained frequent contact with South America during the earliest years of its settlement.

In February 2008, a mysterious couple lured Lindsay Buziak to a $1 million home for a viewing, where she was brutally murdered. To this day, no one knows who killed her.

Arthur "Jack" Schubarth illegally trafficked genetic material from a Marco Polo argali sheep to breed a giant hybrid species.

In 2007, Doncaster teen Andrew Gosden skipped school and bought a one-way train ticket to London — then vanished without a trace.

A labyrinthine network of tunnels and chambers that’s sat hundreds of feet below the Earth's surface for centuries, Turkey's underground city of Derinkuyu once housed 20,000 people.

Discovered in the city of Xinzhou, this Ming Dynasty tomb was filled with various offerings and artifacts.

Excavations near Tewkesbury Abbey revealed the site of a Medieval farmstead — and the surprising remains of a moat that once surrounded it.

Construction worker Greg Crawley was operating a mechanical digger when he came upon a large stone — one that turned out to be the head of an ancient Roman statue.