Ghostly flying 'whirlpool' that appeared above Hawaii could be leftover SpaceX rocket fuel

Tech Insider
A blue spiral flies through the night sky on January 18. Photo captured by a National Astronomical Observatory of Japan camera.
A blue spiral flies through the night sky on January 18. Photo captured by a National Astronomical Observatory of Japan camera.

National Astronomical Observatory of Japan

How Japanese black vinegar is made using a 3-year aging method

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