Tenets of quantum mechanics and special relativity, among other theoretical ideas, lead inexorably to string theory.

A financial system is a set of institutions that permit the exchange of funds and credit. Learn how banks, insurers, and ...

Sitting in a restaurant, you reach for the ketchup bottle, eyeing the basket of fries in front of you. You give the bottle a ...

In a recent paper in Nature, a team of scientists led by Kimihiko Nakajima, an astronomer at the Kanazawa University, Japan, ...

The ancient Greeks looked to use the four main elements to interpret reality and the world. Empedocles was the proponent of ...

Eighty years after its founding, the UN system remains central to advancing peace, development, humanitarian action, and human rights, supporting millions of people every year. As challenges grow more ...