It's a bad line <a href=" http://www.workingfamilies.org.uk/quanto-costa-cialis-10-mg.pdf#educational ">professional cialis vs regular cialis</a> This theory has come in the last few decades to be held by the majority of scientists as a way of explaining gold&#039;s abundance. There may only be 1.3 grams of gold per 1,000 tonnes of other material in the Earth&#039;s crust (the rocky shell of the planet that is around 25 miles thick) but that&#039;s still too much to fit with the standard models of our planet&#039;s formation.