Fossil mystery: The ‘alien plant’ that defies classification In 1969, paleobotanists identified fossilized leaves of the extinct species Othniophyton elongatum, which translates to “alien plant.”

Fossil mystery: The ‘alien plant’ that defies classification: In 1969, paleobotanists identified fossilized leaves of the extinct species Othniophyton elongatum, which translates to “alien plant.”

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