Dedicated to optics and provides information on an international level on the science of optic usage.

We sell and rent magnetic field meters such as magnetometers, gaussmeters, teslameters, EMF meters and magnetic field sensors used for measuring magnetic fields, EMFs, cell phone and mobile phone towers.

Hosts discussions ranging from mainstream science to cutting edge. Its main emphasis is on physics, yet it also includes forums on a wide array of other topics in science and mathematics.

Online discussion forum dedicated to prospective and current physics graduate students.

US published publication focused on providing insights about developments in science and technology. Site features sections dedicated to mind, health, technology, sustainability and education.