Under Pressure

In the crushing darkness of the Mariana Trench, marine biologist Grace Mann expects twelve hours of routine data collection inside a cramped research submersible. Sealed with her steady husband Toby at the controls and fearless dive specialist Eliza Goodman squeezed into the jump seat, the mission begins like any other—professional distance, tight quarters, and the hypnotic glow of deep-sea creatures performing their ancient mating rituals just beyond the observation bubble.

But the l…