Once a star reaches the end of its life stage and becomes a red giant, any chance for life is extinguished. This is also true ...

The map, based on FEMA’s blast-radius and fallout modeling, paints a harrowing picture: if nuclear war were to erupt, as many as 250 million Americans — roughly 75% of the population — could perish.

An international team of astronomers including researchers at the University of Arizona Lunar and Planetary Laboratory has ...

Now, however, it is increasingly clear that pollution is a planetary threat, and that its drivers, its dispersion, and its effects on health transcend local boundaries and demand a global response.