You have probably seen a necklace with the fossil tooth of a shark or a domestic collection of small treasures with this type of objects. The fascination for these curious fossils dates back to ancient times, but at that time, their origin was unknown. They used to be attributed magical or supernatural powers and there were different legends and hypotheses that speculated about their origin. Did you know that they played a crucial role in the history of geology?
When Nicolas Steno revealed the mystery of its origin by analysing the head of a shark, he revolutionised what was previously known about the history of the earth. Why, you may ask? In this post we tell you the details.