I was surprised, too. I found this article[0] which specifically calls out boats as having been invented before the wheel. It puts the wheel's invention in good

I was surprised, too. I found this article[0] which specifically calls out boats as having been invented before the wheel. It puts the wheel's invention in good perspective, I think. Regarding boats capable of crossing the ocean: Australia was settled 40,000 years ago, presumably by settlers who arrived by boat. [0] http://www.smithsonianmag.com/science-nature/a-salute-to-the-wheel-31805121/ http://www.smithsonianmag.com/science-nature/a-salute-to-the...