Despite the variety of their physiological function and differences in physical properties--silk is a flexible fiber, horn a tough rigid solid, and the enzyme pepsin water soluble crystals--proteins are sufficiently similar in molecular structure to warrant treating them as a single chemical family.
Disney's 'Tower of Terror' Closing to Make Way for New 'Guardians of the Galaxy' Ride. Looks like another Disney attraction is joining its sizable graveyard of defunct rides.
Closing date. This is the article about the former attraction at Magic Kingdom. For the currently existing attraction at Tokyo DisneySea, see 20,000 Leagues Under the Sea (Tokyo DisneySea attraction). 20,000 Leagues Under the Sea: Submarine Voyage was an attraction at Magic Kingdom at the Walt Disney World Resort in Florida from 1971 to 1994.