Alien Life Likely on Billions of Planets
Study estimates 1.6B planets may host intelligent alien life.
A 2025 study in Nature estimates 1.6 billion planets in our galaxy could host intelligent life, based on the Drake equation and new data.
With 200 billion stars, 80% having planets, and 2% in habitable zones, liquid water is key.
The study suggests 1 in 100,000 planets may develop intelligent life, factoring in chemical and biological evolution over billions of years.