The Silurian Bridge -- Greig Beck, Paperback Children's Baby - Picturebooks Even though they've known each

Even though they've known each other for years

At the heart of this delicate balance is Avery

This is the question that begins a race between the North and the South to come up with the biggest

resulting in an ecological collapse that still holds lessons today

They are accompanied by three removable art cards

The Silurian Bridge -- Greig Beck, Paperback Children's Baby - Picturebooks Even though they've known eachThe Silurian Period, approximately 420 million years ago. A time even before the dinosaurs. Evolution was just beginning to flex its muscles, and on land and in the sea, new creatures were evolving. In this strange world arrive a team of time travelling North Korean agents with one goal change the past and alter the future. And if they are successful, the United States may never exist. Following them back in time are Alex Hunter and his team of elite