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.