Andreas Thurnherr says it may surprise that much still unknown about spill 's flow in deep sea . Comment: Thurnherr : It is notoriously difficult to take measurements at that depth . Data collection must continue when spill is done to gauge environmental impact .
Andreas Thurnherr says it may surprise that much still unknown about spill 's flow in deep sea . Comment: Thurnherr : Data collection must continue when spill is done to gauge environmental impact .