Antarctica is a destination that attracts explorers, soul searchers…those brave enough to face the unknown. Visiting the White Continent used to require guests to forget comfort and embrace ruggedness—expedition ships aren’t exactly known for providing guests with the finer things in life. But in recent years, new luxury vessels, including Silversea’s just-launched Silver Endeavour, have made it possible for intrepid travelers to enjoy a comfortable retreat while exploring a destination that pus...