Trove of pristine shipwrecks

Shipwrecks in Antartica

By Tia Ghose - LiveScience

The oceans surrounding Antarctica may be littered with buried shipwrecks in pristine condition, new research suggests.

Researchers came to that conclusion, detailed Tuesday in the journal Proceedings of the Royal Society B, after burying wood and bone at the depths of the Antarctic oceans and analyzing the handiwork of worms and mollusks more than a year later.

"The bones were infested by a carpet of red-plumed Osedax worms, which we have named as a new species — Osedax antarcticus — but the wood planks were untouched, with not a trace of the wood-eating worms," study co-author Adrian Glover, an aquatic invertebrates researcher at the Natural History Museum in London, said in an email.

"The wood was hardly degraded either, after 14 months on the seafloor."

That finding suggests that some of the most iconic shipwrecks — including the Endurance, the most famous ship to ever sail to Antarctica — could be perfectly preserved in the icy waters near the southern continent.

Sir Ernest Shackleton first set sail for Antarctica aboard the Endurance. At the time, the ship was the strongest one ever built. Yet it was crushed by icebergs in the Weddell Sea near Antarctica in 1915 and sunk.

More than nine months later and a after a series of harrowing ordeals, the entire crew was eventually rescued.

In any other ocean, wooden ships like the Endurance are quickly devoured by shipworms or wood-boring mollusks.

Antarctica, however, has been treeless for the last 30 million years. Instead, the region is teeming with whales and other cetaceans whose bones sink to the ocean floor.

That raised the possibility that, whereas ocean dwellers feast on wood in other regions, local organisms may have adapted to devour bone in Antarctica.

Full story...