There's a “Gravity Hole” in the Indian Ocean, and Scientists Just Figured Out Why

In 1948, Dutch geophysicist Felix Andries Vening Meinesz was sailing the planet on a gravity survey when he discovered an anomaly in the Indian Ocean. It was a circular depression in the ocean floor that begins to dip near India’s southern tip and extends 1.2 million square miles. This depression, known as the Indian Ocean geoid low, has baffled scientists since its discovery.