Nereus deep-sea sub 'implodes'

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The robotic vehicle Nereus went missing while exploring one of the ocean's deepest spots: the Kermadec Trench, which lies northeast of New Zealand.

Surface debris was found, suggesting the vessel suffered a catastrophic implosion as a result of the immense pressures where it was operating some six miles beneath the surface.

The $8 million Nereus was a flagship ocean explorer for the U.S. science community.

Click here for the full report by BBC News.