Discovered the world's largest ancient shark tooth about the size of a hand
The tooth, 14.6 cm long and weighing nearly 0.5 kg, belongs to the megalodon, the extinct giant shark.Traces of 2.5 million-year-old 'beast' sharks appear ... in the middle of the city
In a natural sink in the heart of Mexico's state capital of Yucatan, scientists have discovered traces of megalodons, beasts that are many times larger than ordinary sharks.