A lot of dark secrets about Alcatraz have been revealed over the years, and now a group of scientists has found one more buried under the former prison's walls.
Researchers from Texas A&M University, using ground-penetrating radar technology, discovered a network of tunnels underneath the San Francisco island prison. Experts had believed the tunnels were destroyed long ago. Professor Mark Everett explained the technology to BBC News.
From BBC News:
"The cart has a transmitter and a receiver — it sends an electromagnetic wave into the ground that then reflects off all the different structures underneath.
"Much like medical imaging would make a scan of the body, we are making a scan of the ground under the rec yard."
But why were there tunnels under the prison, often called "the Rock"? Was Al Capone trying to pull a "Shawshank"? Not so fast, Hollywood.
The tunnels were from the 19th century, when the island was used as a military fort. The researchers believe they also found magazineRead More »from Under the Rock: Alcatraz's secret tunnels discovered