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Mass strandings of cetaceans are a mysterious phenomenon, which is usually shown by pictures of animals already laying on the beach, dead or alive. Such a stranding of 30 dolphins occurred a few days ago at Arraial do Cabo, Brazil, where it was exceptionally recorded on video since the beginning. An entire pod of apparently healthy dolphins comes straight towards the beach for no obvious reason. Hopefully this extraordinary evidence will help scientist better understand a mass stranding (which has a happy ending in this case).
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