Gravity - you can't touch it, taste it, smell it, or hear it rustling in the trees. Some say it's HUGE while others make claims that it is nothing.
Most people feel it's effects in the same way while others seem to live outside the "laws" that scientists claim are connected to it. Take Shaun White's recent performance in the half-pipe at the 2010 Olympics. Shaun seems to be able to pick and choose when it will have an effect on him and to what degree.
There are some who seem to be effected by it's pull more than others. Adults seem to be pulled back down to the Earth with more force than children. It also seems to effect humans more with greater age. Take my father for example. When I was a child he was up and down a lot. He would climb up stairs with ease, ladders were not even a thought and even being thrown in the air by a bucking bull seemed fun. But, in the years he gained the label "grandpa" gravity seemed to pull harder upon his frame than before that title was bestowed on him. I found him sitting or reclining in a chair far more often. He would put off taking an item upstairs to his bedroom until he could combine it into another necessary trip up the same mountain.
Even though it is a force that cannot be measured itself, it is something that scientists can measure the result of it's existance. Some have coined the phrase "What goes up must come down". It makes things fall to the Earth... snow, rain, hail, confetti, vomit (thank goodness), leaves and even people. It does seem to have a greater effect on humans when they are doing a task that requires some skill: walking on a slippery surface such as ice, stepping over something or simply walking down a flight of stairs.
I have recently been privlidged to experience the effects of gravity with all its force while performing a task that required some skill. This brings to mind a possible future topic for discussion: "Bruises, why we get them and can they really be fun?".
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