It's under Eurasia, but due to the projection does not look like it does on maps and globes..

Can I prove it? Sure.

There are seven continents, which are as follows: North America, South America, Africa, Europe, Asia, Australia, and Antarctica.

In the picture, the continents are laid out as follows: Australia to the top left, South America below Australia, North America to the right of South America, Europe and Asia to the right of North America, Africa is southwest of Eurasia. That's six of the continents, so the only remaining one must be Antarctica, Q.E.D.

Edit: Why it isn't Greenland:

Area. The black mass that I claim is Antarctica is roughly half the size of Africa and North America. It looks roughly the size of Australia (due to warping of projection), and quite a few of the black mass can fit into Eurasia.

Greenland is about 2,166,086 km², which makes it about 1/13^th the size of Africa, and 1/11^th the size of North America. If the continents are even roughly to scale, Greenland would be much smaller.

Anarctica, on the other hand, has an area of about 14,000,000 km². almost half the size of North America and just over half the size of Africa, which is what we see in the map.