Or that tobacco has been found in Egyptians mummies, a product native to North America?
Interesting that you should bring this up- tobacco flecks were found on some mummies that had previously been examined, the results of amateur archeologists smoking right over the mummies, when they were first found in the 1800's! You can imagine how unthinkable this would be today- considering how dry those mummies are; they would probably have gone up in a flash and bang if a spark had fell. Anyway this was the preliminary conclusion so the premise was discarded.
However, Dr. Balabanova who is a forsenic toxologist, an expert in forsenic analysis did a series of tests in the early 80's that confirmed that there were traces of nicotine in those mummies- she did another round of tests in the 90's, this time, gas chromatography tests were included, that revealed traces of nicotine, cocaine, and hashish in seven mummies (inside their intestines). This was quite upsetting as you can imagine- as the mummies were authentic, and the tests are proven method in forsenic analysis which is basic police crime investigation work.
So the end result is not only that the Ancient Egyptians smoked tobacco, but they also probably chewed coca leaves (the most likely method of ingestion since the modern method of refinement into cocaine powder most probably did not exist) in addition to smoking hashish, and probably opium. As tobacco is native to North America, so is the coca leaf native to South America, so you are talking about not only trade/exploration to North America, but also to South America.
Personally I have always been of the belief that trade, even during the development of early Ancient Egypt, was international. As far back as 1,000 BC, there is evidence that the North Star was used in celestial navigation on the high seas, by the Phoenicians. And by evidence, I mean linguistic evidence, which does not rule out that the use of the North Star isn't any older than that only because material evidence didn't exist circa 1,000-2,000 BC, and even as far back as 5,000 BC.
As a side note, I'd like to point out that this scarcely is an endorsement of drug use just because Ancient Egyptians ingested them. These drugs were manufactured as part of trade, by tradesmen in the Ancient World- they were commodities. Money from the production of those items went into the "pockets" of socially-productive tradesmen, people who worked for a living. Today, the purchase of those same drugs is putting money in the pockets of violent and dangerous people who think nothing of killing women and children, as we can see, for instance, in present-day Mexico.