Simplify the following text for a Grade 8 native English-speaking person.
Original: They were not expecting to find a new species , and were surprised at the recovery of a nearly complete skeleton of a hominin they dubbed LB1 because it was unearthed inside the Liang Bua Cave .
Simplified: They were surprised at the recovery of a nearly complete skeleton of a hominin ( the name of the tribe ( like a biological familly ) to which humans also belong ) . They called it LB1 because it was unearthed inside the Liang Bua Cave .