These observations led them to propose the sliding filament theory, which states that the sliding of actin past myosin generates muscle tension. Because actin is tethered to structures located at ...

Dark matter, though invisible, weaves a vast cosmic web that binds galaxies together. For the first time, astronomers have captured a sharp image of one of these filaments, stretching 3 million ...

The magnetron theory is simple enough ... The idea is to make a heated filament the cathode, so electrons are ejected from the hot surface by thermionic emission. These are forced into a spiral ...