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Unusual Traits: Tongue Rolling, Special Taste Sensors, and More (Lightning Bolt Books: What Traits Are in Your Genes?)
Unusual Traits Tongue Rolling Special Taste Sensors and More - Lightning Bolt Books: What Traits Are in Your Genes? Author:Buffy Silverman Can you roll your tongue into a U-shape? Some people can. But other people's tongues stay flat. What determines whether you can roll your tongue? Read this book to find out! — Learn about the physical features you inherit in the What Traits Are in Your Genes? series--part of the Lightning Bolt Books? collection. With high-energy designs, exciting... more » photos, and fun text, Lightning Bolt Books? bring nonfiction topics to life.« less