"Smell is such a powerful and revealing sense because it detects actual little pieces of things in the world. It gives us direct evidence of what those things are made of-unlike the indirectness of vision or hearing, which register light waves and air movements. Those little pieces are volatile molecules, so little that they're able to break away from their source and fly invisibly through the air to reach our nose. To begin to understand a thing's...

Explores the science of smells, including how the nose works, which creatures have the best senses of smell, and some of the world's stinkiest stinks.

When Elliot wakes up to a terrible smell, he is determined to find the source.

"Frank has a book, a map, and a plan to find the Stinky Feet Monster. Bean has new boots, a new hat, and a drum, and is ready to rock--BOOM, BOOM, BOOM! He doesn't believe in the Stinky Feet Monster, but as the two friends trek through the dark woods, they encounter strange noises, big footprints, and a very foul odor. Could that be the elusive monster? Will it make Frank and Bean its next meal?"--

Four curious martians travel to an amusement park on Earth in search of the smelliest smells to bring back to Planet Moop.