
The secret world of insects revealed. Every fall, insects disappear. And every spring, they return. Where do they go? The dragonfly dies, leaving its young safe in the muddy bottom of a stream. The monarch butterfly sails the air to dry mountains in Mexico. And the Arctic woolly...

The secret world of insects revealed. Every fall, insects disappear. And every spring, they return. Where do they go? The dragonfly dies, leaving its young safe in the muddy bottom of a stream. The monarch butterfly sails the air to dry mountains in Mexico. And the Arctic woolly...