The Ultimate Pizza Quiz

There are some rare cases when humans have non-circular pupils, and one of these cases is called coloboma. It can result in several pupil shapes, like oval, keyhole, or teardrop shapes. This is due to a hole in part of the eye's structure, like the iris, retina, or choroid.

Australia is a country, a continent and an island! It is also the largest island in the world! No wonder it has so many wonderful and unusual species of flora and fauna!

Washington, D.C. is home to a lot of impressive architecture. The Washington monument is plain and simple, while other buildings win you over with intricate details. Just take a close look at the northwest tower of the National Cathedral – one of the many gargoyles you’ll find there is actually Darth Vader!