Aircraft observations of Hurricane Rita show that downward winds outside the eye wall led to its replacement by a new outer eye wall, causing cyclic strengthening of the storm.

As in rodents, adult human neurons born along the fluid-filled ventricles in the brain migrate to the olfactory bulb along a tubelike extension of the ventricle.

Balancing the densities of electrons and holes across a grapheme-based junction can focus an electric current, potentially leading to electronic lenses and electron beam-splitters.