Could Advanced Aliens Be Living Nearby? Scientists Say It’s Unlikely

Even planets billions of years older than Earth may host only microbes if photosynthesis supplies too little energy. Science fiction often imagines Earth’s galactic neighborhood teeming with hyper-advanced extraterrestrial civilizations, but the actual cosmos near us may be far quieter. A study published in the International Journal of Astrobiology, led by Chris Doughty, a professor [...]