That the arrival of Europeans in the New World in 1492 led to a massive shift in the ecological landscape has been widely accepted for the past 50 years. Suddenly a trans-Atlantic exchange—maize for wheat, tomatoes for apples, tobacco for horses—meant that plants and animals were moving between continents for the first time.
Click here for original story, Manuscripts and art support evidence that syphilis was in Europe long before explorers could have brought it home
Source: Phys.org