Clever Hans was a horse who could do math problems, tell time, read, spell, and more . . . or could he?
Even after seeing Hans answer questions correctly, some people thought it must be a hoax. Scientists began to investigate. Eventually, one scientist had a groundbreaking 'aha!' moment and realized Hans was clever in a way no one had even imagined. Turns out Hans was so smart, he changed science! 32 pages, hardcover. Grades: Preschool-3.