In need of a spa day? Why whales migrate to tropical waters

Whales have long been known to undertake mega-migrations. The seasonal occurrence of these marine giants provides great excitement, opportunities for tourism and a myriad of local ecological benefits. Yet, whilst scientists have documented and mapped these journeys for many whale populations across the world, the underlying reason for such odysseys has remained elusive. New research now suggests that whales may make these epic undertakings for the benefit of their skin.

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