Ancient Meteorites Were Different
Types of rocky meteorites rare today were abundant 466 million years ago
Life, Unbounded
Discussion and news about planets, exoplanets, and astrobiology
Despair Not This Earth
Rational thinking, creativity and wonder are powerful tools in the universe
Vast Shadow Sweeps Across Young Exoplanetary System
18 years of Hubble Telescope data on a star system reveals a surprising phenomenon spanning tens of billions of miles
![NASA's 50 Years of Mars Exploration [Video]](https://static.scientificamerican.com/blogs/cache/file/25E79892-D832-4B5B-B723D390B47D661F_agenda.jpg?w=275&h=154&fit=crop)
NASA's 50 Years of Mars Exploration [Video]
Humans have been visiting and exploring Mars for more than half a century, and NASA has released a video celebrating the agency's remarkable contributions
Another 1/230,000,000th of a Galactic Orbit
As the solar year ends, let's try to stop being so parochial
Earthrise Renewed
Forty-eight years ago human eyes first witnessed Earth rising over the moon; today we can all see it in high-definition
Fresh Ideas for Chasing Consciousness
Understanding life in the cosmos includes tackling the problem of consciousness—a new institute called YHouse intends to help
Cassini's Grand Finale, Part 1: Ring-Grazing and Turbulence
Long-lived space mission starts a bold last-dance with gas giant Saturn
Fermi's Basement Paradox
Where in the world did Fermi go?
Spawning Stars
An extraordinary new image shows a protostellar disk fragmenting into multiple stars
Blog Index
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Anthropology in Practice
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Beautiful Minds
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Budding Scientist
Everything you always wanted to know about raising science-literate kids
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Cross-Check
Critical views of science in the news
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Dark Star Diaries
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Dog Spies
Explore the science behind the dog in your bed
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Extinction Countdown
News and research about endangered species from around the world
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Hot Planet
Climate science in a changing world
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Illusion Chasers
Illusions, Delusions, and Everyday Deceptions
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Life, Unbounded
Discussion and news about planets, exoplanets, and astrobiology
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Observations
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Roots of Unity
Mathematics: learning it, doing it, celebrating it.
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Rosetta Stones
Adventures in the good science of rock-breaking.
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SA Visual
STAFFIllustrating science since 1845
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Talking back
STAFFA science blog, sans blague
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The Artful Amoeba
A Blog About the Weird Wonderfulness of Life on Earth
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Voices
Exploring and celebrating diversity in science.
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