Diego Garcia, a remote Indian Ocean island nearly 2,000 miles from the East African coast, boasts clear-blue waters, pristine beaches — and a US-UK military base at the heart of the great-power ...

The Indian Ocean "gravity hole" is Earth's deepest geoid ... creating a 1.2-million-square-mile anomaly southwest of India. The "African blob," a crystallized magma mass 100 times taller than ...