• Researchers investigating the southeastern Indian Ocean have uncovered one of the largest and deepest whale graveyards ever recorded, stretching roughly 746 miles. • Fossils at the site have accumulated for at least 5 million years. • Recently deceased whales at the location are sustaining deep-sea ecosystems, including species that may be previously unknown to science. A team of scientists piloting a deep-sea submersible in a remote part of the southeastern Indian Ocean has identified an