Science meets real-life mystery in this adventurous look at incredible unexpected finds that changed history.Secret treasures are buried all around us -- you just have to look for them!Accidental Archaeologists takes you on an adventure through time to relive some of the coolest surprise...

A Wall Street Journal 20 Best Children's Books of the Past 20 Years Selection! Chirri and Chirra go underground in this charming addition to the Chirri & Chirra series. Behind a hole in their basement wall, Chirri and Chirra discover a network of tunnels. Join them...

Discover the down and dirty secrets of underground creatures in this vibrant picture book from a Caldecott Honor medalist. What young child doesn't love playing in the dirt? And who hasn't wondered what goes on in the lives of all the creatures who live underground? ...

"A rousingly rumbly ramble." --Kirkus Reviews The Land Before Time meets Eric Carle in this delightful read-aloud featuring "melodious and spare" (USA TODAY) language by master storyteller Tim McCanna. Follow a triceratops, a sauropod, and...

Down where worms wriggle and microbes squirm, there's a whole world waiting to be discovered... Under Your Feet delves beneath the Earth's surface and explores the diverse wonders hidden there. Encounter creatures of the deep and marvel at the mind-boggling size of the...

Wham-a-hammer, bam-a-slamma! The construction crew is back -- but what are they building this time? Crash-a-rumble! Smash-a-grumble! What's at work? Here's a clue: It will clear the ground for you. Bulldozer! Coming through!