Sunspot AR3500 blasted a M9.8-class solar flare. NASA's Solar Dynamics Observatory captured footage of the flare in multiple wavelengths. Views from the ESA/NASA Solar and Heliospheric Observatory ...

The Republic, the best-known work of ancient Greek philosopher Plato on democracy, authored around 375 BC, has shaped Western political thought. By Matthew Duncombe Greece is now known as the “cradle ...