Jan. 19 (UPI) -- The Pentagon is bugged -- new research out of Australia suggests the stone used to build the Pentagon is home to 340-million-year-old mineralized microbes.
The Pentagon isn't alone. The ancient microorganisms are found in oolitic limestone, a popular construction material found in buildings all over the world, including the Empire State Building. Oolitic limestone is named for its layers of bead-like spheres of calcium known as ooids.