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Physics

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holmium atoms

ATOMIC BIT  Scientists stored data using individual atoms of holmium (shown above). Each 0 or 1 is encoded using the orientation of the atom’s magnetic field.

River in Egypt

WINDING WATERWAYS  Aerial views of watersheds like this one in Egypt can take on fractal-like appearances, with large rivers branching into ever-smaller streams.

superfluid helium

ENTANGLEMENT EDICT  Superfluid helium follows a bizarre rule of physics. The information in a system — entropy — increases with the surface area of the system not with the volume. In simulations of the superfluid, the entropy of atoms (blue) entangled with one another (green) increases with the surface area of the sphere of particles (gray).

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