the.com/oceanography
the science of a planet we named for dirt while it's mostly saltwater abyss.
map gapMore of Mars is mapped than our seafloor.
deep blue95 percent of oceans remain unexplored.
war childModern sonar mapping boomed from hunting submarines.
sound trickWhales' calls travel thousands of miles underwater.
crushing depthPressure at the bottom could squash a tank.