Are We All Aliens? The New Case for Panspermia
   Interviews with experts on panspermia and in other fields shows rising interest in the idea.
   http://www.space.com/searchforlife/aliens_all_001027-1.html

Cosmic Ancestry: The Modern Version of Panspermia
   The Cosmic Ancestry hypothesis - about which this site has a large amount of information - treats all of evolution, not just the origin of life on Earth, as due to interaction with cosmic microorganisms.
   http://www.panspermia.org/

Panspermia
   Descriptive entry in The Encyclopedia of Astrobiology, Astronomy, and Spaceflight.
   http://www.daviddarling.info/encyclopedia/P/panspermia.html

Panspermia Revisited
   Short scientific article by John R. Gribbin. "Spreading of life-bearing spores across the Galaxy (panspermia) may be easier than is usually acknowledged."
   http://arxiv.org/abs/astro-ph/9909013

Panspermia: Society for Life in Space (SOLIS) Society
   Panspermia overview and technical papers.
   http://www.panspermia-society.com/