One example was, did you know that the tooth of a woolly mammoth is about the same size with grooves on the surface just like that of a millstone.
(One example; was; did you know that the tooth of a woolly mammoth is about the same size with grooves on the surface just like that of a millstone)
One example
was
did you know that the tooth of a woolly mammoth is about the same size with grooves on the surface just like that of a millstone