This Topic in Depth presents the science and research of galaxies. First, the University of Cambridge offers clear, logical descriptions and images of the Milky Way, spiral and elliptical galaxies, clusters, and dark matter of the Universe (1). Users can also find educational tutorials on many other cosmology topics. Next, the Space Telescope Science Institute's "Galaxies Galore, Games and More is...

Several new resources are now available from the Pacific Institute for Studies in Development, Environment, and Security Website. This resource, a six-page paper by Sharachchandra Lele and presented by researchgate.net, addresses resiliency in ecological and socioeconomic systems, and the relationship between resilience and sustainability.