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155 mya "Squid" has preserved ink sac


or     http://preview.tinyurl.com/onfe3k

The squid-like creature perished some 155million years ago.

But despite the vast passage of time, experts who unearthed the fossilised remains were able to extract ink from its perfectly-preserved sac and use it to paint a picture of the ancient animal.
The inch-long ink sac had become separated from its owner - Belemnotheutis antiquus - which Dr Wilby said was squid-like but not the same as a modern-day squid.

However the black ink was of exactly the same structure as that of todays version. Although solidified, some was ground up with an ammonia solution to make paint.