Lonesome George's story has made me sad, too. I was especially upset when I heard he had died in June. When they found him, I think it was believed already that the Pinta Island tortoise was extinct. They brought him to the research center for his own safety and to breed him. There was a project going on where they were going to send him back to his native island, along with some other tortoises of a different species. He never got to see his native Pinta Island again. But let's hope that the project is successful and that people don't mess up and cause the other Pinta Island tortoises and Pinta Island hybrid tortoises to die as well. In some of the islands, part of the efforts to bring back other species of Galapagos tortoises involves finding the eggs and taking them to a laboratory to hatch and taking the hatchlings back once they reach a certain age or size. Since people brought rats and other invasive species, they sometimes eat or kill the hatchlings, so they bring them back when they're too big to be eaten.
I'll have to look up some more info on the river turtles. I know that just about all marine turtles are endangered.
_________________
"Of all God's creatures, there is only one that cannot be made slave of the leash. That one is the cat. If man could be crossed with the cat it would improve the man, but it would deteriorate the cat." - Mark Twain