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Only Earth Is a Life Haven

Here are more discoveries that make it reasonable to think complex life is rare in the universe, and might be unique to Earth.

More Challenges to Astrobiology

There aren't likely as many places to live outside of Earth as earlier hoped.

Earth Twin Still Missing in Exoplanet Trove

The Kepler spacecraft has found 2,325 exoplanets so far, but there's still no place like Earth.

There's No Place Like Earth

A survey of known exoplanets finds no real estate as valuable as Earth.

New Thoughts on Habitable Planets

Astrobiologists are trying to standardize the requirements for habitable planets. Do they get them all?

Do You Know How Lucky You Are to Live on Earth?

The factors that make life possible came together so beautifully, even materialists have trouble knowing why we're here.

Planets Defy Bottom-Up Assembly

As much as they want to imagine planets forming from dust, secular astronomers run into insurmountable difficulties.

You Wouldn't Want to Live on "Earth's Cousin"

Despite the hype about another Earth-like exoplanet, Kepler 452b would not be as habitable as Venus.

Desperately Seeking Life Beyond Earth

Earth life cannot be unique. How about you, Mars? Europa, anything? Enceladus? Comet 67P? Please break the silence!

SETI Believers Are Lost in Space

How long can you say "watch this space" till onlookers lose interest?

Star Trek for Real: Impenetrable Force Field Protects Earth

Radiation belts discovered at the dawn of the space age have a new trick in their pocket: shielding the Earth.

Saturn Rescues Earth: Outer Planet Wonders

How Saturn saved the Earth, and other news from the ringed planet, its family, and other bodies in the outer solar system.

Moon's Stabilizing Influence Depends on Star Size

A connection between multiple factors was noted in a recent model of how a moon helps a planet remain habitable.

Mars Radiation Fries Organic Compounds

Don't expect the "building blocks of life" to last very long on Mars.

Planet Rotation Limits Habitability

Life can't exist on a planet that rotates too fast or slow. This is another Goldilocks problem for astrobiologists to consider.
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