Planet Earth Is in Critical Condition. These are the Steps the World Must Take to Change That

The Planetary Health Check is a key monitor of earth's vital signs—and will guide action for a more sustainable world.
RealClearScience

Earth Had Rings (and Might Regain Them)

(via PBS Space Time) Planet Earth is the jewel of the solar system—the shimmery blue oceans, the verdant green forests, the wispy whimsical cloud formations. Saturn ...