Then the team chose four sculptures and ran further tests using a larger, more sensitive instrument.

Such rays have defied close study ever since; instead, the telescope turned out to be the most sensitive instrument built to that point for gathering radio waves from outer space.

Every time we repeat a measurement with a sensitive instrument, we obtain slightly different results.

A sensitive instrument can detect changes of as little as one arc second.

To detect the tiny tremors in the ground, researchers commonly use sensitive instruments called seismometers.