New research suggests that the circumstellar habitable zone for terrestrial planets around stars is narrower than previously thought.
Astrobiologists think they may have found where life came from — cyanide in meteorites!
The basic thesis of TPP is that the best places for intelligent observers are also the best places for observing.
Caleb Scharf explores the degrees of magnitude separating the immensity of the universe from the smallest particle of matter.
After perusing a recent article here, a reader offers a classic challenge.