This electron microscopic study deals with the structure of the Z disc of frog's skeletal muscle, with special regard to the I filaments-whether they pass through the Z disc or terminate at it. In most longitudinal sections the I filaments terminate as rod-like projections on either side of the Z disc, one I filament on one side lying between two I filaments on the opposite side. This indicates...

ABSTRACT Matter in the Universe is arranged a cosmic web, with filament of matter typically connecting each neighbouring galaxy pair, separated by tens millions light-years. A quadrupolar pattern spin field around filaments known to influence spins galaxies and haloes near them, but it remains unknown whether themselves spin. Here, we measure dark velocities cosmological simulations, finding th...