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Fluffballs in Space Shouldn't Exist

A rubble-pile asteroid has such low density it should have disintegrated, but it's doing just fine.

Extinct Reptiles Quickly Spread Over the Globe

On every continent, dinosaurs and other extinct reptiles thrived. Here are some recent amazing finds.

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.
Delicate Arch, Utah

Sandstone Arches Get New Explanation

The national park signs may need updating.

Io Volcanoes Go Hyperactive

The volcanoes on Jupiter's moon are bursting out at record rates, and nobody knows why. Is it the new normal?

Amber Alert: New Discoveries in Old Sap

Even old pieces of amber in a museum drawer can reveal unexpected surprises.

Saturn's F-Ring Has Quieted Down

Comparing measurements over 25 years, planetary scientists have noted a drop in bright clumps in Saturn's tenuous F-ring.

Enceladus Geysers Still Unexplained

The number of geysers has topped a hundred on Saturn's overactive moon. How could they be sustained for billions of years?

Dinosaur Extinction Story Becomes More Chancy

Why did dinosaurs die but birds and butterflies survive? The latest idea involves sheer dumb luck.

Darwin: Imagine a World Without Him

A new book tries to imagine how different the world would be, had Darwin as an individual not lived to promote his particular views on evolution.

Start Over: The Evolution of Planets Is All Wrong

Ideas about planetary evolution are so far off base with observations of exoplanets, it's time to wipe the slate clean.

Keeping Titan Old

As the Cassini orbiter makes its 103rd close pass by Titan, have long-agers found ways to keep it billions of years old?

Homage to Diatoms

Twenty percent of the air you are breathing came from tiny animals living in crystal cathedrals.

Beware of Misinterpreting Water Claims

A claim of vast reservoirs of water deep in the earth is based on indirect evidence, and likely has little or nothing to do with surface water or floods.

Without Bromine, There Would Be No Animals

A 28th element has proven to be essential for life: bromine.
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