According to the Mahabharata, after flowing as a great river for 2000 years, the Sarasvati disappeared in desert, reappeared in some places and then joined the sea "impetuously".
Scenarios suggest that the end of the world would bring Earth's collision with a black hole and arrival of the next solar maximum. On positive note, some believe that this date marks the beginning of a new era.
Many ancient cultures, from China to Greece, America to Australia, told tales of dragons. Surprisingly, many of these societies had no contact with each other. So, did they really exist?