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Scientists seek a single description of reality. But modern physics allows for many different descriptions, many equivalent to one another, connected through a vast landscape of mathematical possibility.

What does John Nash’s game theory equilibrium concept look like in Rock-Paper-Scissors?

Gravitational waves have opened up new ways to test the properties of black holes — and Einstein’s theory of gravity along with them.

The theoretical physicist Joe Polchinski, who died Feb. 2, left a tremendous professional and personal legacy, says a friend and collaborator.

Simple math shows how widespread vaccination can disrupt the exponential spread of disease and prevent epidemics.

For decades, physicists have struggled to create a quantum theory of gravity. Now an approach that dates to the 1970s is attracting newfound attention.

Triangles fit effortlessly together, as do squares. When it comes to pentagons, what gives?

To discover our species’ deep history and to shape its future health, we should learn from the microbes that accompanied us on our evolutionary journey.

If you didn’t get a flu shot, you are endangering more than just your own health. Calculations of herd immunity against common diseases don’t make exceptions.