By detecting heat this can provide a picture that would be impossible to detect with just the human eye.

Although the young woman's wide smile was as pleasant as spring, Robin detected heat in her tight eyes.

Here, let me start you off: 'Can you detect heat and cold?'

It also possessed internal sensors enabling it to detect heat.

Able to detect human scent, heat and sweat.

The telescope's 6,000 infrared sensors work by detecting heat.

These detect heat from newly launched missiles and can help estimate flight paths.

When a bat detects heat it is actually sensing the infra-red radiation given off by a warm body.

The radiotelescopes were detecting heat radiated from several feet below the surface.

Mr. Dreeben replied that while the device can detect heat, "it will not tell you what's going on inside the house."