Many years ago, I had occasion to invite a distinguished American mathematician to India. He was a highly accomplished researcher and a gifted teacher. However, unsurprisingly, he had had no occasion ...

Most famous equation: Einstein's E = mc2, which means energy is equal to mass times the speed of light squared. Known digits of pi: More than 105 trillion digits Digits of pi NASA uses for equations: ...

Objects are made of atoms, and atoms are likewise the sum of their parts — electrons, protons and neutrons. Dive into one of those protons or neutrons, however, and things get weird. Three particles ...