This engaging picture book biography shows how pioneering astronomer Vera Rubin, who discovered evidence for the existence of dark matter, the most mysterious substance in the universe, changed people's understanding of both the universe and what a woman can do.

"When Fannie Farmer learned to cook in the late 1800s, recipes could be pretty silly. They might call for "a goodly amount of salt" or "a lump of butter" or "a suspicion of nutmeg." Girls were supposed to use their "feminine instincts" in the kitchen (or maybe just guess). Despite this problem, Fannie loved cooking, so when polio prevented her from going to college, she became a teacher at the Boston Cooking School. Unlike her mother or earlier cookbook...