Extraterrestrial
Civilizations Don’t Even Need Space Ships to Migrate From Star System to Star System
In about 5 billion years, the Sun will leave the main sequence and become a red giant. It'll expand and…
Maybe We Don’t Hear From Aliens Because They Choose To Go Silent
How will humanity meet its end? That's only a depressing question if you think that humanity will go on forever.…
What is the Kardashev Scale?
In 1961, Russian-Soviet astrophysicist Nikolai Kardashev published a paper where he introduced the Kardashev Scale, a means of classifying extraterrestrial…
What is the Arecibo Message?
In 1974, the famous Arecibo Message was sent into space, humanity's first and only attempt at messaging extraterrestrial intelligence.
If Alien Probes are Already in the Solar System, Maybe we Could Detect Them Calling Home
According to a new study, alien probes may permeate the galaxy, and could be detected in the Solar System when…
Not Saying it was Aliens, but ‘Oumuamua Probably Wasn’t a Nitrogen Iceberg…
In a recent paper, Amir Siraj and Prof. Loeb show that the "nitrogen iceberg" theory cannot explain the mysterious nature…
NASA is Getting Serious About the Search for Life in the Universe
Frameworks are a valuable tool in science. They give context to sometimes abstract concepts such as “how powerful can an…
If Aliens Are Out There, We’ll Meet Them in a Few Hundred Million Years
A new study indicates that aliens are probably out there, occupying half of the Universe, and we'll likely meet them…
We’ll Have to Wait About 3,000 Years for a Reply From Intelligent Civilizations
According to a new study by Harvard Professor Loeb and Amir Siraj, it would around 3000 years to hear a…
A New Plan to Search for Extraterrestrial Artifacts at Earth and Across the Solar System
Professor Avi Loeb has announced a new project that will search for 'Oumuamua-like objects in our Solar System, which could…