WHO was CLAUDIUS GALEN, and WHERE and WHEN did he WORK?

HOW did he FURTHER DEVELOP the 'THEORY OF THE FOUR HUMOURS' first introduced by HIPPOCRATES?

What TYPES OF PEOPLE did he often TREAT at one point, allowing him to GAIN EXPERIENCE with TREATING INTERESTING INJURIES?

WHY did he often carry out DISSECTIONS on ANIMAL REMAINS rather than HUMAN CORPSES? What IMPACT did this have on the PROGRESSION of MEDICAL ADVANCEMENT?

HOW MANY texts concerning MEDICINE and SURGERY did he GALEN publish during his lifetime? WHY were they so SIGNIFICANT?

What was considered his MOST FAMOUS EXPERIMENT?

(Which he REPEATED many times!)

What was GALEN'S OVERALL AIM?

What MISTAKE did GALEN make when DISSECTING A DOG?

What TWO WAYS did GALEN use to get AROUND the RESTRICTIONS of being UNABLE TO DISSECT A HUMAN BODY?

Crucially, WHY did NO-ONE CHALLENGE GALEN'S MISTAKES?