1. How long did the Russian team drill before reaching Lake Vostok?

2. What U.S. state is the lake close to in size?

3. Where in our solar system do scientists believe there are ice crusts similar to those on Lake Vostok?

4. What is the coldest temperature ever recorded on Earth, and where was it recorded?

5. Did scientists know Lake Vostok lay beneath the Antarctic ice when they started drilling there?

6. How does the water in Lake Vostok stay liquid?

7. When can the scientists return to Lake Vostok to gather their samples?