The turtles nest in the Caribbean before travelling to UK waters to feed.
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But could the rewriting of the Turtles' origin story dissuade some fans from embracing the newest incarnation?
Enter the satellite tracking devices, which scientists are using to try to make the turtles' migration safer.
If there is insufficient water to swim in, however, the turtles have to resort to desperate measures.
For a list of all of the turtles admitted to the hospital since 1996, check out this list.
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The turtles, who have been named Bert and Ernie, were cleaned and fed and are now being kept under observation.
As expected, the turtles periodically submerged their heads in the water for between 20 and 100 minutes at a time.
The turtles began their journey at the start of April from Costa Rica's Playa Grande in the Las Baulas Marine Park.
When their predator returned, the turtles grazed over a wider area.
"The tracking devices provide very important information -- to protect the turtles you have to know where they are and when they are there, " Mast said.
More and more leatherbacks are being spotted around the coast of Britain and Ireland, suggesting the turtles are trawling our waters for their favourite food - jellyfish.
Residents of this Indonesian island have hunted and butchered the turtles for their meat and raided their nests for their eggs until few of the animals remain.
To protect sea turtles, an endangered species, they want an import ban on shrimp caught in nets that don't have escape hatches to let the turtles swim away.
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'People are curious to see the turtles hatch, ' says Pakdin.
The Great Turtle Race, in which the turtles paddle 3, 700 miles from their feeding grounds off the coast of Nova Scotia to the Caribbean -- where they breed and nest -- begins Thursday.
Scientists from the National Oceanic and Atmospheric Administration, the Louisiana Department of Wildlife and Fisheries and the Audubon Nature Institute freed the turtles Thursday in waters about 40 miles southwest of Grand Isle, Louisiana.
One way round this for a swimming animal is to develop an outlet which allows urea to dissolve directly in the water as it swims, which is what the turtles seem to have done.
Having outlived the dinosaurs -- dating back some 110 million years -- the turtles are also among the most enduring creatures on earth and, biologists say, an important gauge of the health of the marine ecosystem.
While the following represents a complete butchering of the trading system utilized by the turtles, it will suffice to say that when a commodity broke out, the turtles, as well as the legions of traders who today trade based on technical analysis, added to their positions.
Indeed, a calculation Dr Ip performed, based on the volume and composition of the urine he collected in the plastic buckets, and of the head-dunking water at the end of each day, suggested that only 6% of the urea excreted by the turtles was leaving them in the traditional manner, via urine.
While some scientific research has been done, no systematic survey of the fishes and turtles of the Bosawas Biosphere Reserve has ever been completed.
The largest turtles on Earth, leatherbacks once were plentiful in every ocean but the Arctic and Antarctic.
The area is believed to be the last nesting place in Bali for the sea turtles.
Once in the water, another significant percentage of the baby turtles is quickly devoured by hungry sea creatures.
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But on Perancak Beach, on the southeast side of the island, the World Wide Fund for Nature (WWF) is working to educate villagers about the need for conserving the endangered turtles.
The 33 turtles had been rescued more than three months ago by federal officials and state wildlife authorities from Louisiana, Florida and Georgia, as well as the Riverhead Foundation and the In-Water Research Group.
Volunteers would care for injured sea turtles, monitor the beach for nests each morning and make sure that baby sea turtles made it safely to the water each night.
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Dr Read told the meeting that the tracking data he collects are now available online, to allow fishermen to follow the movements of turtles and, if they wish, to modify the deployment of their nets accordingly.
The selected area is currently home to one of the foremost nesting sites for sea turtles in the region.
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