For Radio Producers, 10 to 20 years of experience on the job amounts to an average salary of $45K. More than 20 years of experience mean a somewhat bigger median paycheck of $51K, but it's not much more than what less experienced people make.orkers with less than five years' experience earn around $30K on average, and those who have five to 10 years under their belts see a higher median salary of $34K.
Scientists examining documents dating back 3,500 years say they have found proof that the inception lies not with Hippocrates (460BC-370BC) and the Greeks but in ancient Egypt and the likes of Imhotep (2667BC - 2648BC), who designed the pyramids at Saqqara and was elevated to become the god of healing.
Quick Answer. The catapult was invented by engineers working under Dionysios of Syracuse in approximately 399 B.C. The first catapult design was small and closely resembled an early Medieval crossbow that used a released trigger to launch missiles.