The Science of Aliens, Part I: Would They Be Friendly, or Threatening?
Any advanced alien species would have a social structure, but would also likely have predatory roots.
The Fuss Over Phosphorus
A critical element takes center stage in the discussion of how life began, and where it might exist.
We May Never Find Life on Mars—And That Could Be a Good Thing
Perseverance, the Fermi Paradox, and the Great Filter.
Could Doomsday Come From a Reversal of the Magnetic Poles?
Lessons from the Laschamps Excursion 42,000 years ago
This Intriguing Signal From Alpha Centauri May (or May Not) Be a Planet
Could the star system closest to us host a habitable super-Earth?
Crows Are Even Smarter Than We Thought
Could they help us understand intelligent life on other worlds?
Arsenic and (Very) Old Life
This normally toxic substance might have been useful in the oxygen-deprived environment of early Earth.
Artificial Intelligence: Cure for What Ails Us, or Looming Threat to the World?
From biological machines to superintelligence.
The First Sign of Intelligent Life Beyond Earth?
Examining this and other intriguing questions at the start of 2021.
Astrobiology’s Biggest Stories of 2020
A lot has been achieved, even in an awful year.
Early Earth Was No Inviting Blue Planet—It Was More Like Venus
New insights on how, and when, terrestrial planets become habitable.
How Salt Water Could Fuel a Mars Mission
A new invention might speed up human exploration of the Red Planet.
A New Place to Look for Life on Mars
…or at least evidence of past biology.
The Most Hellish Planet Yet
In a place where it rains rocks, we can exclude life for sure, right?
An Environmental Horror Story
The Permian mass extinction, 252 million years ago, has lessons for today.
When Asteroid Impacts Are a Good Thing
Craters could create habitable conditions on many planets and moons.
Two Dozen Exoplanets that Might be More Habitable than Earth
Do we need to change our search parameters when looking for extraterrestrial life?
More Lakes Found Under the Martian Ice
But would such cold places be habitable?
The Likelihood of Life on Venus Just Increased Dramatically
A sample-return mission to our planetary neighbor should now be considered.
A New Tool to Detect Alien Biochemistry
Life detection on Mars and the icy moons of the outer Solar System looks more and more feasible.
Page 2 of 14