every science video on ScienceHack is screened by a scientist to verify its accuracy and quality

A kayak is a small human-powered boat. It typically has a covered deck, and a cockpit covered by a spraydeck. It is propelled by a double-bladed paddle by a sitting paddler. The kayak was used by the native Ainu, Aleut and Eskimo hunters in sub-Arctic regions of northeastern Asia, North America and Greenland. Modern kayaks come in a wide variety of designs and materials for specialized purposes. Kayaks are commonly referred to as canoes, although these are a different form of boat. (wikipedia)