The Cambrian-age Tonto Group is a set of rocks famous for holding clues to the burst of new life that reshaped Earth 500 ...

Known as the Campana structure, this pyramid was built using tephra, or volcanic ejecta, produced by the catastrophic Tierra ...

The pyramids are some of the most fascinating structures on Earth, and new light keeps being shone on the wonders of the ancient world. However, one lesser known ‘pyramid’ is hidden away in the Amazon ...