Albert Einstein proposed that matter curves space-time, and that gravity is the curve that causes objects to deviate from traveling a straight line. The distortion causes the objects that were moving along a flat plane to fall into a spherical path.
SCIENCE FRICTION: FIVE FIRE-MAKING METHODS Most experienced Scouts know how to start a fire without a lighter or matches. Do you? When lost in the wilderness, being able to make a fire can be a lifesaver, both to signal your location and to use for warmth and cooking. Here are five ways to start a small fire in an emergency.
How to Find True North Without a Compass — Basic survival skills are essential for anyone living off the grid, whether it’s by choice or in a SHTF situation. In the event that you have to navigate without landmarks, technology, or even a compass, you need to know how to find true north.