For today's Geo Quiz --- we're visiting the great Southern ocean.

See if you can name one of the seas that surround Antarctica. It stretches more than 1,000 miles across from the Antarctic Peninsula to an icy region called Coats Land. A coat is a basic necessity in this sea.

Travel across these waters, with frigid temperatures and shifting sea ice, can be perilous. Just ask Earnest Shackleton. He was the explorer who came this way nearly a century ago.

Shackleton's ship, the Endurance, was trapped and crushed by ice flows here in 1915.

Shackleton's ship, Endurance

We'll hear from someone who hopes to cross this sea in the New Year:

“Each day will be quite different as it is in Antarctic always because the weather changes often, you've got big winds big storms but you also have beautiful days with big blue skies.”

We'll hear more about those big blue Antarctic skies when we reveal the answer...