small 'b' sustainability

“Earthrise” image taken by the Apollo 8 moon mission from about 240,000 miles (380,000 kilometers) away. URL: http://spaceindustrynews.com/cassini-probe-to-take-photo-of-earth-from-898-million-miles-away/

Viewed from space, the earth is a tiny blue dot in a vast black area studded with other bright spots. This is the only planet we know of that supports life, and everything we need is here. These posts reflect on the centrality of maintaining sustainability of life on earth that happily accommodates civilised humans.