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Wrestling is the oldest sport

Explanation:

With the possible exception of athletics, wrestling is recognised as the world's oldest competitive sport. Indeed cave drawings of wrestlers have been found dating as far back as 3000 BC. The sport was introduced into the ancient Olympics in 708 BC.

technology is the application of the knowledge gained by science.

it is given that trillions of microbes make up to 1% to 3% of the body mass.

let's take average of this percentage: 2%

consider the average mass of the human body as 70 kg.

then, trillions of microbes would have mass  

therefore, 100 trillion micro-organisms would weigh:

this is an approximate value and could change depending on the mass of the human body and percentage of the microbes present in it.

average mass per microorganism =