Several new missions aim squarely at a long-standing astronomical conundrum, with the promise of improving space-weather predictions

Lunar samples hinted at a barrage of debris pummeling planets billions of years ago. Fifty years after Apollo 11, that story is still unfolding.

Crustaceans in the Mariana Trench and other underwater canyons feed on food from the surface laced with carbon-14 from Cold War bomb tests