Billionaire Branson’s Virgin Galactic Files To Sell $500 Million In Stock One Day After Reaching Space

Every spot of green space counts

A step toward advancing precision hormone therapies to reduce Alzheimer's risk

Mystery solved: Jupiter’s X-ray aurora explained. X-ray flares are triggered by periodic vibrations in Jupiter’s magnetic field lines, which create waves of plasma that allow ions to “surf” down into the atmosphere, where they collide at high speed and generate X-rays.