If you're basing the claim that they discovered America first on the book 1421 (...

danpalmer on Nov 11, 2016 | parent | context | favorite | on: China’s ‘Artificial Sun’ achieves fusion breakthro...

If you're basing the claim that they discovered America first on the book 1421 (which many people do) then you should know it's generally considered to be very poor quality historical research by most historians.