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The most obvious scenario to delay European discovery of the Americas is to have Columbus die en route.

However, in the previous thread about this topic, it was argued that due to Portugal's Volta do mar navigational technique and English voyages to find Hy-Brasil, that if Columbus didn't return, European discovery of the Americas would only have been delayed by at most a few decades.

Easy enough. Let's set the point of divergence earlier, back in the 1300s.

What if:
  1. The Marinids win the Battle of Río Salado in 1340 and restore enough of al-Andalus to prevent Portuguese expansion into the Atlantic.
  2. The Hy-Brasil legends in Britain are just forgotten (after all, legends were forgotten all the time) some time before 1492.
This could delay European discovery of the Americas to the 1700s.

How will the Americas, Europe, Africa, and Asia develop differently if this were the case?
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