By E. John. De Waard and Nancy De Waard. How do cats see in the dark? How can you prove that plants perspire? What insect has the longest life span? Two books (one for younger and one for more sophisticated readers) each pose 190 challenging science questions. Each question appears on a single illustrated page with the answer printed upside-down at the bottom of the page. Good Year Books.192 pages each. ©2005. GDY536.