Final answer:
The Himalaya mountain range began to form about 50 million years ago as a result of the collision between the Indian Plate and the Eurasian Plate. It is still actively rising due to the ongoing collision.
Step-by-step explanation:
The Himalaya mountain range, formed as a result of the collision between the Indian Plate and the Eurasian Plate, began to form around 50 million years ago (50 Ma). This mountain range is still actively rising as a result of the ongoing collision between India and Asia.
In scientific notation, 50 million years would be written as 50,000,000 years. In fully written form, it can be expressed as fifty million years.