The Himalayas—taller every year
The Himalayan mountain range is nearly 25 million years old, yet it is one of the youngest mountain ranges in the world. It was formed as a result of the collision of two tectonic plates over millions of years. The Indo-Australian plate is presently colliding against the Eurasian plate at a speed of 67 millimetres per year, which means that the Himalayan mountains, the tallest in the world, are getting even taller.