useless trivia: What Word Means: Sunrises - Becomes Apparent?

Questions

what is a shark's skeleton made of?

whose adventures are told in a book subtitled adventures in a desert island?

what's the only base unit of measurement still defined by an artifact?

what triple crown-winning horse took the 1973 belmont stakes by 31 lengths?

which is furthest west --- dublin, glasgow, or lisbon?