Smithsonian Voices

From the Smithsonian Museums

Will the Blue Marble Stay Blue? This famous Earth photo, known as The Blue Marble, was taken on December 7, 1972 by astronauts on the Apollo 17 spacecraft – the last manned lunar mission that provided humans with such an opportunity. Beautiful and fragile, the Blue Marble became a symbol of the environmental movement and part of the official Earth Day flag (Photo credit: NASA).

This Earth Day, the Planet’s Health is Your Health

We are now living in a highly connected world. Human health threats anywhere can have impacts everywhere. However, we can only be as healthy as the global ecosystem in which we live and on which we depend. This is the main message of Planetary Health--an evolving discipline of enormous scope, where human health is inseparable from the state of Earth systems.