Fossils of the arm of a sloth found in Puerto Rico in 1991, and dated at 34 million years old, made it the earliest known mammal of the Greater Antilles islands.
A. sloth found in Puerto Rico in 1991, and dated at 34 million years old, made it the earliest known mammal ofit here is a little vague but workable.
B. sloth, that they found in Puerto Rico in 1991, has been dated at 34 million years old, thus making it the earliest mammal known on who found? what does they refer to?
...
A. sloth found in Puerto Rico in 1991, and dated at 34 million years old, made it the earliest known mammal ofit here is a little vague but workable.
B. sloth, that they found in Puerto Rico in 1991, has been dated at 34 million years old, thus making it the earliest mammal known on who found? what does they refer to?
...
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