Just like a single ant who's lost in the large expanse of Brazilian Casino Beach ( Praia do Cassino , 250km in length, considered to be the largest beach on Earth), and felt as small as possible in surrounding space, we humans are experiencing similar sensation when it comes to space and especially time. But, contrary to ants, we have the ultimate tool, called science, that is allowing us to see beyond the horizon. If we could place ourselves in ant's shoes, we would find clues and evidence all around us and, metaphorically speaking, no matter of large quantities of sand grains, we would know that we were on the beach. And with time, when it comes to history of life, all the clues lie in fossil records of coral reefs. The main study, performed by J.E.N. Veron in his publication " A Reef in Time ", identified five periods in Earth's history with major extinction of corals that built reefs. In all five periods, fossil records of the reefs needed millions of ...