This was formed during the melting of the Wisconsin Glacier about 10,000 years before present.

The range was formed about 550 million years ago during the Petermann Orogeny.

The modern health care system in Korea had been formed for about 30 years since opening the country in 1876.

"That's the Ibs, who have existed in their current species form for about a million years, right?"

The Sun formed about 4.6 billion years ago from the gravitational collapse of a region within a large molecular cloud.

It is thought to have formed about 75 million years ago during the Late Cretaceous period.

The depression is interpreted as a meteor impact crater formed about 14.3 million-14.5 million years ago in the Miocene.

This particular forum, for instance, was designed to gather support for a country formed about one hundred and fifty years after 1812.

The mountains were formed about 400 million years ago when two continents collided.

Adults who were abused or traumatized in childhood form their earliest memories about 2-3 years after the general population.