Also known as the reef knot or the Hercules knot ... The backpacker's hitch is one knot that backpackers like to use to secure a clothesline, tent or hammock around a tree or another object.

Humanity has been using knots for thousands of years ... strength - the force needed to untie them. For example, the reef knot is the strongest knot in existence, while the grief knot can be ...

One example is the reef knot (top) vs. the grief knot (bottom). One is considerably stronger than the other. What does this mean, exactly? According to researchers, people were consistently unable ...