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

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

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

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/