Earth’s magnetic field feels permanent, but science tells a far more fragile story. Long before modern life emerged, the invisible shield protecting the planet from solar radiation weakened to a ...

It may seem easy to distinguish whether something is alive or not. You are alive, as is your teacher, and the trees you see on your way to school. Your desk and chair are not alive, and neither are ...

Right now, you’re zooming through space at incredible speeds. As just one of all the living creatures on Earth, you’re along for the ride as our planet constantly moves in two major ways. First, ...