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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.

Blow to Supernova Nucleogenesis Theory

There's 100 times less of a radioactive element on the ocean floor than expected.

Uranium-Lead Dating Fraught With Discordance

Behind the confidence of uranium-lead dates hides worry about numbers that don't match up.
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