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South China Sea Blue Hole Could Be World's Deepest

Dragon Hole, or Longdong, is reportedly more than 300 meters deep. If confirmed, that would be far deeper than the previous record holder, Dean's Blue Hole in the Bahamas

21 hours ago — Stephanie Pappas and LiveScience

Dark Matter Stays Dark

The most sensitive search yet for the mystery substance draws a blank after 20 months

July 22, 2016 — Sarah Lewin and