User blog comment:OneofthePendragon94/The age of Merlin, Arthur, Morgana and Gwen./@comment-4190137-20121115055714/@comment-69.110.235.121-20121123153045

Morgana: ? I think she's older - Uther said she wasn't here during the Purge, but that's because she didn't arrive in Camelot until she was older.

Gaius: ? That's actually not true. ? The average age in Medieval times was low because people died in childhood, wars, and of disease - but the normal human lifespan even then (assuming you achieved adulthood) was considered to be 72 (it's a medieval thing - life was classified into 6 stages of 12 years). ? In fact, especially in the upper-classes, it was very common and even expected for people to live into their 70s, so Gaius' age is not excessive, especially since he's a physician and knows how to be healthy.

The dragon is over 1,000 years old, so someone 17 is easily a "young boy". ? Heck, Gaius is pretty much a young boy. ? You'll see when you're older that late teens still seem like boys to you.