PSEB Class 12 Exam 2026: Punjab School Education Board (PSEB) has recently released exam structure for question papers for all subjects. The board has also announced the official dates for board ...

The electronic structure of atoms and molecules is the series of energy levels that it are possible for a bound electron to occupy. This electronic structure determines many of the defining ...

It is now possible to write and read magnetic information at the atomic scale by manipulating and imaging atoms on a magnetic template with a spin-polarized scanning tunnelling microscope. Figure 1: ...

Iran’s system of government is not quite a democracy, nor a theocracy. Founding Supreme Leader Ruhollah Khomeini developed its animating doctrine, known as guardianship of the jurist, in the years ...