The clocks and watches featured here are just a sampling from ... History Shelf Calendar Clock National Museum of American History Galileo Pendulum Clock Model, Replica National Museum of American ...

Using a big data approach, the researchers have developed a computer model called the "Single-Cell Immune Aging Clock," which can be used to determine aging processes within individual immune cells.

Different models of cell cycle regulation converged when scientists realized that different model organisms shared the same molecules. See how data from frogs and yeast were reconciled.

The size, power, and other metrics of a latest-generation chip-scale atomic clock.