The amplituhedron, a shape at the heart of particle physics, appears to be deeply connected to the mathematics of paper folding.

If you correctly recall the elementary trick for order of operations, solving this problem should be a breeze.

In 1991, four teenage girls were killed at a frozen yogurt shop in Austin, then roughly half the size the booming city is now. Eliza Thomas, 17, Amy Ayers, 13, and sisters Jennifer Harbison, 17, and ...