Simplify the following text for a Grade 10 native English-speaking person.
Original: However , in 1997 and 2000 , Paul Sereno discovered half a dozen new specimens , including one with about half the skeleton intact and most of the spine .
Simplified: In 1997 and 2000 , Paul Sereno discovered half a dozen new specimens , including one with about half the skeleton intact and most of the spine .