Marianne GuenotWed, November 3, 2021, 9:01 AM·4 min read

• Marine ecosystems were thrown out off-kilter by the mass hunting of big whales.
• Whales’ krill consumption keeps ecosystems in balance, and a study found they eat more than thought.
• The finding means that each whale is even more important than people realized.

Scientists have found that large whales eat at least three times as much as previously thought, a discovery which highlights their importance in keeping the oceans healthy.

The study,published Wednesday in the peer-reviewed journal Nature, provides clues as to why wiping out…