What protective coat does a scientist often wear?

A prolific warrior and builder, which pharaoh ruled Egypt for about 66 years in the 13th century B.C.? A promotional pianist for the piano maker Erard, which Hungarian wrote "A Faust Symphony" in 1857? What stand does an artist use to hold a canvas? A prosthesis is an artificial replacement for which kind of body part, such as an arm or leg? What is the protruding part of the face below the lips? What word describes a proud, stiff, pompous walk? What English proverb is the Spanish "No hay tiempo como el presente"? What English proverb is the Spanish "Pensar antes de hablar"?