I can get them here without human intervention or knowledge for a period of time.

It is thought to have been brought here by human intervention in the 19th century.

Then all of a sudden the line would be clear again, without any human intervention.

It is something nature could not have produced without human intervention.

Take a quick look at the photograph and see if you can spot the human intervention?

Modern subway systems have been run without human intervention since the 1980's.

This also enables it to run without need of human intervention.

You could turn it off and on - that was the limit of human intervention.

Worms work their way through a network without human intervention.

In a few cases, human intervention was responsible for a disappearance.