Below the high altar of St. Peter's, investigators have found sheep bones, ox bones, pig bones, and the complete skeleton of a mouse. Was Peter himself ever there?  Read article here.

(Image credit: "Plan of the Necropolis" by digitalisiert von Mogadir - Pietro Zander; Fabbrica di San Pietro (Hrsg.): The Necropolis under St. Peter's Basilica in the Vatican.2010, ISBN 978-88-7369-081-8.. Licensed under Creative Commons Attribution 3.0.)

A good way to study ancient Rome is to explore the cellars -- and subcellars -- of modern Rome.  Read article here.