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Hawaii volcano's 'explosive' eruption sends ash plume soaring, prompts warning

Hawaii volcano: What's the worst-case scenario for Kilauea?

'10 times larger than Hiroshima': How North Korea's huge nuclear blast caused a mountain to collapse

China building system to detect earthquakes 3 weeks in advance

Spectacular 6-story-deep sinkhole opens on New Zealand farm

Treasure island: Rare metals discovery on remote Pacific atoll is worth billions of dollars

Meteorite hunters: Scientists set to scour Antarctica for rare space rocks

Mount Etna in Sicily is sliding into Mediterranean Sea, scientists say

Top 10 US national parks

Spectacular ice caves you can visit year round