It's one of the strangest mysteries of the 20th century.
This is one of the largest bitcoin transactions ever.
Researchers have no idea how the observatory could have disappeared.
The disappearance at the turn of the 20th century still fascinates over a century later.
Google the “Dyatlov Pass incident” and you are going find some incredible theories into the mysterious deaths of nine hikers.
Spoiler: it isn't a time portal.
No one knows what caused it.
One piece of evidence finds Captain Zaharie Ahmad Shah deviated slightly over Penang, his childhood home.
Over the past few years, an unusual number of bodies have been found in the city's canals, sparking theories about a killer dubbed "The Pusher".
The man was reportedly still dressed in his ski clothes and had no idea what day it was. He also had a new phone and a fresh haircut.
Dave MacDermott vanished in one night in Kitchener under strange circumstances and his family is still looking for answers.
There are currently 1,600 people missing around Australia. Here are the stories of four.