The fossils of three ichthyosaurs -- giant marine reptiles that patrolled primordial oceans -- have been discovered high up in the Swiss Alps, and include the largest ever tooth found for the species, a study said Thursday.
With elongated bodies and small heads, the prehistoric leviathans weighed up to 80 metric tons (88 US tons) and grew to 20 meters (yards), making them among the largest animals to have ever lived, AFP reported.
