The "Dokos" that Jeri thinks has lasted. This however from the link that Jeri provided:

"The ship itself is long gone, as everything biodegradable has been taken back by the sea. The remains at the sea floor of a cargo site of hundreds of clay vases and other ceramic items are evidence of the shipwreck.[1] The four-thousand-year-old ancient shipwreck was discovered by Peter Throckmorton on August 23, 1975."

First five words say it all.

Both the Vasa [1628] and the Mary Rose [1545] were successfully recovered from the seabed and will remain preserved for generations to view and learn from.

"Polar bears spend most of their lives on the sea ice of the Arctic Ocean, which gives them access to the ringed seals that are their primary food. The loss of sea ice habitat is the biggest threat to the survival of polar bears." - henryp

1. Polar Bears spend most of their lives on the sea ice of the Arctic Ocean henryp primarily because it is there.

2. If there was no sea ice the ringed seals would still be there, they would still have to come onshore.

3. The loss of sea ice habitat is the biggest threat to the survival of Polar Bears - Did a polar bear tell you that henryp? My guess henryp is that even without ice the polar bears would still hunt, catch and eat ringed seals in the Arctic wastes.