In addition many groups have been formed so that the elderly can socialize with one another and remain active participants in American life.

In fact, to move at any speed the polar bear uses twice as much energy as do most other mammals.

To reach the North Pole is not easy.

She has finally reached the Arctic.

She wants to travel to Antarctica, of all places.

She took an active part in the women's lib movement.

Integrative medicine refers to a many faceted medical approach that emphasises individual differences and aggressively includes the latest scientific techniques based on modern Western medicine as well as various other medical systems like traditional medicine and natural medicine.

The habits of highly intelligent people offer a clue as to how to do that.

Editors often go to extremes in providing their readers with unimportant facts.

In some companies, employees use paid holidays for their summer vacations.

Man, too, has been given protective devices against extreme temperatures.

The polar bear, which lives on the polar ice-cap, will lose its home and die out.

He was charged with a secret mission.

He explored the region around the South Pole.

They explored the Antarctic.