Let's look at how Long Island was formed around 20,000 years ago. It has to do with a glacier that brought plenty of material along with it and left some behind when it receded.

Join Karine as she goes behind the scenes at the University of Oxford, one of the world’s oldest and most prestigious educational institutions and alma mater to kings and presidents.

The city of Oxford is home to some 150,000 residents and a famous seat of learning, the oldest English-speaking university in the world. Although the exact date of its founding isn't known, it is said that local priests and monks were first taught in monastery schools in the area in the eleventh century.