1.   But standard medical tests such as pricking the skin with a pin show Hallam has no feeling.

2.   He found many enemies on his journey, and his eyes have the glazed look of someone for whom pain no longer pricks the skin.

3.   If they work, the crash-landing technique could be used in subsequent missions to prick the skins of other celestial objects.

4.   In skin testing, they scratch or prick the skin with a liquid extract of the food in question and look for welts or hives.

5.   Place the sausage on a baking sheet and lightly prick the skins.