While the subject of the video remains still, movement - from the lake, trees, a boat that speeds by - is occurring all around it.

As a rule, the subject remains under the control of the operator.

The subject remains controversial and extensive further searches for environmental factors are underway.

No one doubted that one subject, gravity, will remain at the center of the physics stage for many years to come.

But nearly half the subjects remained less than thrilled, even after taking the pill.

At the same time it is a comfortable position so that the subject may remain in it for quite some time.

As with many old photographic processes that had long exposure times, a kind of neck brace was employed to aid the subjects to remain still.

How significant or lasting that erosion was remains a subject of debate.

But there remains one subject of lingering insecurity in Cascadia about its new global role - the weather.

The test requires the subjects to remain still.