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How long have humans (and their relatives) had access to boat or purposeful raft technology? I'm not counting things like drifting from Africa to South America somehow as the ancestor(s) of South American monkeys apparently did [1] but deliberate use of technology to cross water.
1: Although wouldn't it cool if we (somehow) learned that crossing was somehow accomplished on purpose and not by accident?
1: Although wouldn't it cool if we (somehow) learned that crossing was somehow accomplished on purpose and not by accident?