Infinitesimally

In the case of the big-bang theory, they assume the existence of all the matter and energy of the universe, and all of space and time, wrapped up into an infinitesimally small point. From this "singularity", as it is called, the whole universe sprang forth.

His idea is to stand billions of ultrafine wire loops around the edge of a silicon chip — hence the name racetrack — and use electric current to slide infinitesimally small magnets up and down along each of the wires to be read and written as digital ones and zeros.