Here's one forest that should be safe from deforestation: an underwater kelp forest in the Pacific Ocean. The forest is so dense that it's home to a huge range of plants and animals with their own ecosystem. Scientists believe that they may become a refuge for animals once global climates change.

The Pacific kelp forest has plants growing from 100 to 150 feet, some brushing the surface of the ocean. It's not very impressive when viewed from above (all you'll see is floating green stuff) but beneath, the waters are brimming with life and activity, just like a tropical forest on land.

This kelp forest came as a surprise to scientists because it was found in the tropical waters of the Pacific. Normally kelp forests can be found in cooler waters and the discovery of the Pacific forest comes as a reminder that still little is known or understood about the world underneath the waters.