From Jacob Silver, Ph.D., President:

Re: Sunless but livable planets may be detectable (Sept. 10): Sunless planets, with sufficient radiation heat to keep water liquid, would still not be able to have photosynthesis. Thus, the only life forms possible would be archea, or simple anoerobic bacteria.

Jacob Silver, Ph.D., President
Huron Mountain Research Services, LLC
P.O. Box 425
Marquette, MI 49855