String theory attempts to unify general relativity and quantum theory. Popular in the 1990s, string theory fell out of favor as it failed to provide testable predictions and required ten dimensions ...

If you could take an apple and break it into smaller and smaller parts, you would find molecules, then atoms, followed by subatomic particles like protons and the quarks and gluons that make them up.

A changing world demands a resilient response. The United Nations employs a diverse range of mechanisms and tools to prevent conflict, foster people-centered, peaceful resolutions, and build ...