The basic thesis of TPP is that the best places for intelligent observers are also the best places for observing.
The Big Bang theory also gives us an age for the universe. The latest estimate, based on several cosmological observations, is 13.80 +/- 0.02 billion years.
Cosmologists have come a long way since Edwin Hubble published that ratty looking plot of galaxy recession velocities versus distance.
Contrary to first impressions, exoplanet discoveries actually strengthen the impact of the Fermi Paradox.
The Discovery Principle led me to consider looking to the Moon to study the origin of life empirically.