With this amendment to ROSES-2005, NASA announces a new due date for
Notices of Intent to propose (NOIs) to the Astrobiology: Exobiology and
Evolutionary Biology program described in Appendix B.12. The NOI due date
is June 24, 2005.

On or about June 2, 2005, Amendment No. 15 to NASA Research Announcement
"Research Opportunities in Space and Earth Sciences" (NNH05ZDA001N) will be
posted on its homepage Web site at http://nspires.nasaprs.com/ (select
"Solicitations" then "Open Solicitations" then "NNH05ZDA001N").

The due dates for Notices of Intent to propose (NOIs) to the Astrobiology:
Exobiology and Evolutionary Biology program described in Appendix B.12 have
been changed. The due date for NOIs is changed from June 3, 2005, to June
24, 2005.

This change is made in anticipation of the announcement being made prior to
June 24, 2005, of selections from the 2004 solicitation for the
Astrobiology: Exobiology and Evolutionary Biology program.

Further information about this Program Element is available from Dr.
Michael H. New, Solar System Division, Science Mission Directorate, NASA
Headquarters, Washington, DC 20546-0001; Telephone: (202)
358-1766; E-mail: Michael.H.New@....