Scientists have finally
pieced together
fossils of an animal, which was discovered more than half a century ago. They put the fossils in an electron microscope, initially hoping to find eyes, but they were
astonished
to find teeth smiling back at them.The animal is known as Hallucigenia and had a worm-like
formation
. It was about 5 centimetres long, had seven pairs of legs ending in claws, and long spines
sprouting
from its back. Its mouth was
encased
in teeth, which also lined its throat, and may have been able to
flex
in and out as the animal pulled in food
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