Call for Volunteers: The Mars Society is requesting volunteers to participate as members of the crew of the Mars Desert Research Station in southern Utah during extended simulations of human Mars exploration operations. The upcoming Mars Desert Research Station field season will begin in December 2007 and run through April 2008. Volunteers should state clearly what segment of MDRS field season span they are available. Both volunteer investigators who bring with them a proposed program of research of their own compatible with the objectives of the MDRS and those simply wishing to participate as members of the crew supporting the investigations of others will be considered. Research proposals which focus the effort of or require selection as a team of up to the full six-person crew will also be considered. The Mars Society will be issuing an additional call for volunteers for the summer 2008 field season of the Flashline Mars Arctic Research Station (FMARS) on Devon Island later. However those volunteering for MDRS at this time may also volunteer for FMARS 2008, which is anticipated to consist of a single 2-month crew rotation running from mid-June to mid August 2008. FMARS crew selection is highly competitive, and prior experience at MDRS, while not strictly required, is considered to be an important credential for FMARS selection. In 2004, for example, 6 out of 7 FMARS crew members had prior MDRS experience.