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"Extraordinary" Radiocarbon Anomaly Found in Tree Rings

A tree ring sample from a bristlecone pine reveals something weird happened to the sun around 5480 BC.

Are Paleomagnetic Measurements Reliable?

Dating of past geophysical history depends on magnetic measurements that may be in error.

What You're Not Being Told About Earth's Magnetic Field

The simple story for the public: a dynamo creates the earth's magnetic field. The real story: complex scenario needed to start it and keep it running.

Earth as a Habitable Planet

When viewed as a planet among planets, Earth is surprisingly surprising, considering how close it is to scientists' investigating eyes.

Of Planets and People

Here's a quick tour of the planets to see what's newsworthy.
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