Motion and Stability: Forces and Interactions
- Earth
How Earth’s surface morphs
Partly melted rock acts like grease to help huge masses of the planet’s surface slip up, around and down.
- Space
Wanted: Garbage collectors in space
Scientists say we should clean up the cosmos now to avoid crashes in the future.
- Earth
Tsunami’s trek traced in the sky
Scientists photograph atmospheric ripples that followed the March tsunami across the Pacific.
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