Sea fossils found on some of the world's tallest mountains are reigniting fierce debate over whether the biblical story of Noah's Great Flood could be rooted in real events.

Marine fossils discovered near the summit of Mount Everest reveal that the world’s highest mountain was once part of an ancient ocean floor before tectonic collisions lifted the Himalayas.

Archaeologist and professional diver Julianna O’Donoghue has explored everything from a drowned forest  off the Cork coast to a 17th century ship laden with coconuts ...