<span>The outermost planets where so far away from the sun (many times the distance of earth) that they where invisible to the naked eye. This means that by simply looking into the eye at night it was possible to see the closer planets but not the outermost ones.</span>
Joints are the places in your body where bones come together.
Risks can accumulate over time through exposure to different things over life which is a normal part of life generally. People who do a lot of crazy things are people who are more prone to having different kinds of risks being brought upon them. If you're working as a construction, it's more likely with time that you will suffer from some sort of work-related accident than someone who works in an office all day long.
False the average adult eats around 1,600 to 2,300