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  1. Planetary Science

    Debate over life in Mars rock rekindles

    Two recent studies could inject new life into the argument that a 4-billion-year-old Martian meteorite contains fossils of bacteria from the Red Planet but several scientists say the reports fall short of resurrecting that notion.

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  2. 18904

    In regards to “Dinosaur fossil yields feathery structures,” the scattered feathery structures may have belonged to an antecedent of Archaeopteryx but not necessarily a Sinornithosaurus. Given the context and location of the fossils, it seems more likely they belonged to the raptor’s last meal before its untimely demise. Aaron Stough Roanoke, Va.

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  3. Paleontology

    Dinosaur fossil yields feathery structures

    Researchers believe they have found primitive feathers on the remains of Sinornithosaurus millenii, a 124-million-year-old raptor dinosaur from Liaoning, China.