We independently review everything we recommend. When you buy through our links, we may earn a commission. Learn more› By Daniela Galarza and Marguerite Preston For a truly stunning holiday pie ...

From the deepest ocean trench to the tallest mountain, plate tectonics explains the features and movement of Earth's surface in the present and the past. The theory of plate tectonics was ...

What was once the border strip is now a place of remembrance. The Berlin Wall memorial gives you a moving insight into the division of Berlin. A GDR soldier jumping over the fence at the last moment.