Simplify the following text for a Grade 10 native English-speaking person.
Original: After Miller 's death in 2007 , scientists examining sealed vials preserved from the original experiments were able to show that there were actually well over 20 different amino acids produced in Miller 's original experiments .
Simplified: After Miller 's death in 2007 , scientists examined sealed vials preserved from the original experiments . They were able to show that there were well over 20 different amino acids produced in Miller 's original experiments .