How did Earth avoid a Mars-like fate? Ancient rocks hold clues

Approximately 1,800 miles beneath our feet, swirling liquid iron in the Earth's outer core generates our planet's protective magnetic field. This magnetic field is invisible but is vital for life on Earth's surface because ...

Heat waves aren't going away. Here's how we can prepare

Across the country, thermostats are rising into previously unimagined realms. It's been a summer of record-setting heat across Europe and the United States, including California. Climatologists don't expect them to be record ...

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