Particle never before seen on Earth detected; it could come from a primordial black hole and the origin of the universe.
Live Science on MSN
City-size, cold-volcano comet transforms into a glowing 'snail shell' after major explosive outburst
Following a massive cryovolcanic eruption, the mysterious Comet 29P/Schwassmann-Wachmann has been morphed into a giant spiral and is now shining 100 times brighter than normal.
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