In the 1920s, sporadic reports began filtering in from RAF pilots in Malta, the Middle East and India of gremlins. At the time, it was superstition not to mention them by name.
On average, a bird s body temperature is several degrees higher than that of humans: their range is usually 39 to 43c (102 to 109f); and humans are closer to 37c.
ANSWERS TO CORRESPONDENTS: In 1953, Sherpa Tenzing Norgay and Edmund Hillary were on top of the world, having become the first men to reach the summit of Mount Everest.
ANSWERS TO CORRESPONDENTS: A network of voice pipes was used for shipboard communication during both world wars, consisting of two cones of wood or metal.