Short answers, pulled from the story.
Scipio Aemilianus entered the world in 185 BC as the second son of Lucius Aemilius Paullus Macedonicus and Papiria Masonis. His father commanded Roman forces that defeated King Perseus in the Third Macedonian War.
The boy's life changed dramatically when he was adopted by Publius Cornelius Scipio, his first cousin who was the eldest son of Scipio's aunt Aemilia Tertia. This adoption transferred him into the prestigious Cornelii Scipiones family line while preserving a link to his biological Aemilii Paulli lineage through a fourth name.
During mopping-up operations after the Battle of Pydna between 171 and 168 BC, the commander grew distressed when his youngest son went missing from camp. He emerged late that night covered in the blood of enemies he had slain alongside two or three comrades at seventeen years old.
Scipio Aemilianus distinguished himself as a military tribune covering retreats and rallying cavalry forces during early Roman attacks against Carthage starting in 149 BC. In 147 BC he was elected consul without drawing lots because desperate fighting continued for over a year in the African theater.
He restored order by forbidding luxuries troops had grown accustomed to while enforcing regular tough exercises including all-day marches and fortification drills. When ready, he encamped near Numantia but avoided shorter routes to prevent guerrilla ambushes and made detours through Vaccaei territory selling food to the besieged city.
Scipio Aemilianus died at home in his bed during 129 BC without visible wounds according to Appian's account of events surrounding his final days. Ancient sources recorded various rumors suggesting foul play involving Cornelia mother of the Gracchi or daughter Sempronia worried about repeal of land laws though Plutarch wrote no convincing proof existed regarding manner of death.