By Matt Walker
Editor, Earth News
A mysterious gray whale sighted off the coast of Israel in the Mediterranean Sea has been seen again off the north east coast of Spain.
The second sighting, made 23 days and 3000km after the first, has continued to perplex whale experts.
Gray whales were thought to be extinct across the Atlantic Ocean, so the appearance of an individual within the Mediterranean Sea was a major surprise.
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That sighting excited and bemused experts: it could either mean that the gray whale had recolonised the Atlantic Ocean, or that a single gray whale had shattered the record for the longest known migration by the species, which usually make a round trip of 15-20,000km each year.
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more:
http://news.bbc.co.uk/earth/hi/earth_news/newsid_8729000/8729064.stm