Take your time exploring the slowest things ever! With captivating photography and fascinating facts, this book invites curious kids on an amusing adventure to explore the slowest wonders that our world has to offer! Discover the slowest plane ever that could be overtaken by a bicycle, the world's slowest heartbeat, the sloth that moves slow enough for plants to grow on it, and so much more! This book is perfect for fact-hungry young readers! Top Ten Slowest Wonders in the World is one of four books in the World's Top Tens series, all about our planet's most impressive record-breakers.