Groucho's Fact Hunt

What's the ninth largest object in the solar system?
You've got eight planets, plus the sun, so the answer must be the smallest of the planets - mercury. No! It is Ganymede - the largest of the moons of Jupiter.
 
The word Testimony derives from the Latin testis which is also where the word Testicle comes from, apparently in ancient Rome, two men taking an oath of allegiance held each other's testicles, and men held their own testicles as a sign of truthfulness while bearing witness in a public forum....
 
In 1960 the four month old son of childrens author Roald Dahl was hit by a car in his pram and suffered serious head injuries, causing a build up of fluid on his brain.

Together with neurosurgeon, Kenneth Till and hydraulic engineer, Stanley Wade, Dahl developed the WADE DAHl TILL valve ( WDT valve ) This was a small hydraulic device that was inserted into the skull of the child and was used to clear fluid from the brain of the child hydraulically.

Stanley Wade was a friend of Dahl from their love of model airplanes and Kenneth Till was a friend of Dahl from him visiting sick children at Great Ormond Street Hospital .

This device went onto save the lives of thousands of children globally until it was eventually replaced by micro technology.
 

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