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What the Apollo Rock Samples Revealed About the Moon

The lunar rocks changed what scientists thought they knew about our satellite, but raised many more questions.

Spinning Solar System Objects to Keep Them Old

If you remove the obligation to think in billions of years, many phenomena in the solar system make more sense.

Surprising Water Found on Inner Solar System Objects

Recently-visited objects in the inner solar system show evidence of water ice or volatile materials.

Ceres Looks Seriously Young

Asteroids should not be so active. This one was, and is.

Did Earth Get Its Water from Meteor Squirt Guns?

You can't just fire bullets at pumice and claim that Earth got its oceans that way.

Dawn of a Young Ceres

The largest asteroid has a problem: she's too young to get a date.

For the Love of Trees

You don't have to be a proverbial tree-hugger to love trees and wonder at all the things they can do, and do for us.

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.

Invisible Influence of Plants Coming to Light

The air is filled with substances we barely notice – molecules produced by plants – but they have profound effects on climate and ecology.
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