g ABODES - A new method of detecting past comet strikes on Earth could help scientists understand how frequent large impacts were in the past. The frequency of impacts could be used to determine the likelihood of future, catastrophic impacts. See article.
g MESSAGE - If we are not alone in the Universe, why have we never picked up signals from an extraterrestrial civilization? Known as the Fermi paradox after physicist Enrico Fermi, who first posed the question, this long-standing puzzle remains one of the strongest arguments against the existence of intelligent aliens. But two physicists say they have come up with a solution. They suggest a way in which aliens could send messages to each other across space that not only disguises their locations but also makes it impossible for a casual observer to even distinguish the messages from background noise. See article. Note: This article is from 2003.
g COSMICUS - What are some ideas - based on the sciences that do exist today - that have been suggested over the years for interstellar travel? See article.
g AFTERMATH - Douglas Vakoch is one of a relatively small collection of scientists addressing the question of how to talk back to extraterrestrials. While most researchers involved in the Search for ExtraTerrestrial Intelligence come from physics and engineering backgrounds, Vakoch draws on a background in linguistics, sociology and psychology to explore SETI-related issues. Here's an interview with him from 2003 about communicating with ET.
