Regional Associations

Broadly speaking, a regional arrangement in the sphere of international politics may be described as an association of states, based upon location in a given geographic area, for the safeguarding or promotion of the participants

Scholarship and security policy: a review of recent literature

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/68058/2/10.1177_002200275900300408.pd

A Habitable Fluvio-Lacustrine Environment at Yellowknife Bay, Gale Crater, Mars

The Curiosity rover discovered fine-grained sedimentary rocks, inferred to represent an ancient lake, preserve evidence of an environment that would have been suited to support a Martian biosphere founded on chemolithoautotrophy. This aqueous environment was characterized by neutral pH, low salinity, and variable redox states of both iron and sulfur species. C, H, O, S, N, and P were measured directly as key biogenic elements, and by inference N and P are assumed to have been available. The environment likely had a minimum duration of hundreds to tens of thousands of years. These results highlight the biological viability of fluvial-lacustrine environments in the post-Noachian history of Mars

American Military Policy

23 cm; 494 ha