Environment
Volcanic thunder recorded for the first time ever and it sounds epic
Watch: Gorilla walks like a human to keep hands clean
Watch: Elephant rescued after being stuck in muddy puddle for 12 hours
Photo of walrus with tusks hooked on ice will make your weekend
Aurora Steve: Mysterious purple lights in the sky spotted by citizen scientists
Ice sheets in Greenland destabilized by chain reaction from melt lake networks
2.5-million-year-old shark tooth stolen: Things to know about the giant creature
World's most powerful magnets could finally make nuclear fusion a reality
Volcanic Winter: 74,000-year-old African fossils show humans flourished post super-volcano
Hawaiian spider species evolved numerous times over 3 million years
The proton battery: A cheap and eco-friendly carbon-based power storage option
Global warming: half a degree increase could flood 5 million people
Mysterious sea 'monster' weighing 330 pounds washes up on Australian beach [Photos]
Horseshoe cloud appears over Nevada: Twitter divided over its shape and origin
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