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The biggest volcano eruptions in recorded history

The Volcanic Explosivity Index (VEI) ranks volcano eruptions by size and power. The scale goes from VEI-0 to VEI-8 and measures ash, lava, and rock ejected. VEI-1 is a gentle eruption that can happen frequently. Italy’s Mt. Stromboli has been erupting almost continuously for 2,000 years. VEI-6s are colossal eruptions […]
The biggest volcano eruptions in recorded history
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Watch NASA fire its most powerful rocket engine ever

VIDEO: NASA has released video of their new rocket thruster for its space launch system. The footage shows the thruster through a special camera NASA calls its "Revolutionary High-Speed, High Dynamic Range Camera." It allows engineers to study the rocket's plume and search for possible flaws.
Watch NASA fire its most powerful rocket engine ever