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Scientists don't know for sure! They do know that more whales are staying in the Arctic ocean longer than ever before. Why? Maybe because the Arctic climate is warming. Sea ice is thinning and shrinking. What does this mean for gray whales? How might climate change affect food, habitat, or migration for this species? It's hard to know. Read our Gray Whale News Updates to see what clues scientists are finding to these unanswered questions. In the Arctic, adult gray whales swallow about 77 tons of food!