WTF? History.

According to this Cracked piece - and they are usually pretty accurate in posting humorous stories of the weird - ancient Egyptian mummies tested positive for tobacco and cocaine - which are both found only in the Americas.

Weird, if true.

Here is an academic paper on the subject, which seems to debunk efforts to debunk the finding.

The scientific consensus seems to be "what a weird finding...oh, look, squirrels!" According to Straight Dope, the finding has been dismissed out of hand as too outre but not disproven:

There the matter rests. According to Emily Teeter, an Egyptologist at the University of Chicago's Oriental Institute, the Germans' work has been dismissed by mainstream archaeologists. No discussion of it is to be found in recent surveys of the field. Theories about transoceanic trade in ancient times are considered too outré to warrant serious consideration. To defenders of Balabanova, Parsche, and company, this suggests a pigheaded refusal to reexamine entrenched beliefs. I disagree. If the Germans aren't being taken seriously, it's largely their own fault.