The Kosi River in the Himalayas once captured part of a tributary: the Arun River. It set off a chain of geological events that reshaped — and is still reshaping — the landscape, a new study has found.

(CNN) - One of Earth’s tallest mountains, Mount Everest, keeps growing taller. Recent GPS measurements showed that Everest was growing at a rate of about 2 millimeters per year rather than the expected 1 millimeter per year. According to new research, this extra lift results from a geological incident.

Mount Everest is Earth's tallest mountain — towering 5.5 miles above sea level — and is actually still growing.

According to a new study, a river roughly 46 miles (75 kilometers) from Everest was "captured" by another around 89,000 years ago. The erosion from this event carved away a huge gorge, leading to a loss of landmass that made the mountain experience a major growth spurt.

Mount Everest is Earth's tallest mountain - towering 5.5 miles (8.85 km) above sea level - and is actually still growing.

Mount Everest has grown by around 15 to 50 metres in the last 89,000 years, and it's increasing every year. Now, scientists think they know

Scientists explain what gave Everest its height advantage over its neighbors and contributes to making it grow taller (by millimeters) every year.

Scientists say Mount Everest, the world’s tallest peak, is still growing thanks in part to the merger of two river systems tens of thousands of years ago.

At 50 million years old and 29,032ft / 8,849m high, the trek to the top of Mount Everest is getting a little longer every year according to new research. Everest was born alongside the side rest of the Himalayas when the Indian subcontinent collided with the Eurasian tectonic plate.