Professor Astrocat: Under the surface

The latest volume of the popular English series of educational books for children and young people. Where did all the water on our planet come from? What exactly is a coral reef? Can we get to the bottom of the ocean? Although the ocean covers nearly three-quarters of the Earth's surface, it is still about 95 percent unexplored. Join Professor Astrocat and his crew on a journey from the seashore to the darkest depths of the mysterious underwater world. From giant whales to underwater volcanoes, there's a lot to explore on this deep-sea expedition!