Imagine you want to pull a long cylinder-shaped piece of soil (called a core) out of the ground in your backyard. You'd need a tool to cut the ground, another to help pull it out, another to store it afterward, along with probably a dozen other random tools you didn't think you'd need.
In your backyard, you can easily go into the house and probably find something that will work to help with the job. But what if you were in the middle of an icy field, with no house or extra supplies to turn to?
To learn more about the Arctic eco-system visit the Frozen Life page, or to learn more about plankton check out an Invisibile Watery World.
