More than 90 years after California's last wolf was killed, a pack has been observed near Mt. Shasta. Are the mountain's glaciers a reason the wolves chose this location?
Researchers say these high-energy neutrinos come from sources beyond our Milky Way galaxy. They say the ability to discover them heralds a new form of astronomy.
A new explanation for the driving force behind ancient fire fountain eruptions on the moon. Plus ... do some volatiles on the moon and Earth have a common origin?
Why are sprites elusive? It doesn’t help that they flash on millisecond timescales. Also, they're above thunderstorms, usually blocked from view on the ground.