Disequilibrium –The Unmistakable Signal of Alien Biological Life

    What if an alien civilization was a billion or more years older than ours and detected Earth in its early history? “For billions of years of Earth history, an alien astronomer may have even been sufficiently misled to conclude that Earth was sterile—despite the fact that life was flourishing in our ocean at … Continue reading Disequilibrium –The Unmistakable Signal of Alien Biological Life