For a long time, Mars enthusiasts in the United States have put forth an argument that a decision by China to end exploration led to the later setbacks experienced by that country. The facts asserted in that argument are now being questioned.

It now is beginning to appear that perhaps an impact-megatsunami led to the destruction of China's fleets, and the ensuing consequences:

http://www.1421.tv/pages/evidence/content.asp?EvidenceID=402

It is known is that the ruler of the Inca undertook a voyage to the western Pacific Ocean ca. 1480 CE. I have not examained the records yet to see if there is any indication of the reasons why he undertook that voyage.

It is also known that settlement on Ponape also suffered a catastrophe during this time period. Certainly an impact mega-tsunami was remembered on Tonga.

we'll see

EP