What do most balls have in common? They are all round. But why are rugby balls are not round?
In  the 1800’s the first rugby balls were made out of pigs bladders and  they were slightly oval. In those days there wasn’t any pumps so you had  to blow it up with your mouth and that wasn’t a popular task. The  people use stem tubes to blow it up. Blowing up the ball was also very  unhealthy.    
     
Later  in the 1800’s two shoemakers stitched 4 leather panels to make rugby  balls for the local school (also called rugby). People replaced the pigs  bladder with rubber bladders. Hand pumps were also invented so you  don’t have to use lung power. Nowadays the rugby balls have to be a  standard size and shape. Rugby balls are very unlikely to have raw,  smelly, germ laden pigs bladders. Rugby balls are made from synthetic  materials.
 
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