How did our Universe begin? What equations underlie its physical evolution? What powers our Sun and moves the galaxies? Our Universal Basics board on Pinterest looks at all of these fundamentals and much more. Learn about sub-atomic particles, the structure of atoms, and the standard model of the Universe using this great collaborative and graphical approach.
Most people will be familiar with the vortex that appears when they take the plug out of a bath but can this happen on a much larger scale? This footage taken in Lake Texoma last year shows such a giant vortex produced as a result of controlled draining to lower water levels. Vortices more generally are seen whenever a fluid rotates around an axis and can appear in everything from a stirred cup of coffee to a tornado. They play a big part in turbulent flow where unsteady vortices at various scales interact to cause chaotic motion.