
Columbus casually making one of the biggest discoveries ever
Explanation:
When earth formed the part of north America that was Alaska never existed, causing humans to not really, know of the existence of the Americas due to the water bridge being too large and not really, seeing them but alongside that the Puijila darwini wouldn't change to become more aquatic and resemble modern day seals, but instead to adjust to the coldness would develop fur insulation and fat reserves, keeping their original more otter look and land based biology, and would be the dominant species of the Americas while humans are the dominant species of the "old world", aka everything but the Americas.