bead

The humid air from outside pushes its way into the basement, pulling beads of sweat from my forehead.

Cassiopeia proved it by using her fingers to do sums on her abacus, and flicked the beads up and down with nary a wince.

The sails had gone slack, and the disappointed girl slumped in one of the cozy nursery chairs and clicked idly at the beads of her abacus: back and forth, back and forth.

To explore this, they placed worms on a layer of beads that mimicked the feel of the E. coli they normally encounter while feeding.

The researchers found that certain phosphate groups in DNA can pull in positively charged molecules during a chemical reaction, helping them align correctly -- much like a magnet drawing a metal bead into place.