useless trivia: What Word Means: To Worry - To Fret?

Questions

Which creature taught Dr. Doolittle how to talk to the animals?

What name is given to a doctor who specialises in skin disorders?

Which name has been most frequently chosen by Roman Catholic Popes?

How did Lawrence of Arabia meet his death in 1935?

Which thick custard-like food is made when fresh milk is artificially curdled by bacteria?