Through a series of flight and lab experiments, researchers found pigeons can use special cells in their liver as an internal ...

Mars does not have Earth’s kind of magnetic shield, so it has often been treated as the solar system’s more exposed world. It is a planet left to take the sun’s blows with far less protection. But ...

Solar cycle space weather models may be miscalibrated: a new helioseismology study found the Sun’s magnetic activity has retreated toward its surface since 1987 in ways sunspot counts never detected.

Every 11 years, the Sun flips its magnetic poles, driving a cycle of sunspot eruptions, solar flares, and coronal mass ejections that can knock out power grids and fry satellites. For decades, ...