A "strange" prehistoric plant species is the lone representative of a mysterious group of organisms that no longer exists, scientists have discovered. The first evidence of the species—in the form of ...

An “alien plant” fossil discovered 55 years ago just outside of an abandoned town in Utah has no relation to any currently existing or extinct species, scientists revealed in a study last month.

Scientists have discovered a unique fossil that does not match any known species of flowering plants, an advance that sheds more light on the planet’s ancient diversity. Researchers first spotted the ...