Karla Lant is an experienced freelance writer, journalist, editor, and adjunct professor. She focuses on science, technology, politics, education, and technical writing. Browse by publication below.
The Milky Way Galaxy alone is home to between 100 billion and 400 billion stars, and each is potentially orbited by planets. There are probably at least 2 trillion galaxies like ours in the observable universe, each one populated by trillions of planets orbiting hundreds of billions of stars. Even if planets capable of sustaining life are exceedingly rare, on the numbers alone there should be intelligent life somewhere in the universe. For example, according to Business Insider, if a mere 0.1 percent of planets in our galaxy that might be habitable harbored life, that would mean there were about a million planets with life on them.