Moss does not only grow on the north side of trees, as it is commonly believed by many. Moss typically grows on the north side but this rule only applies in the northern hemisphere. In the southern hemisphere, moss mostly grows on the south side of trees. The reason for this inversion is that in the northern hemisphere, because of the tilt of the Earth on its axis, the sun almost always appears to be a little south of directly overhead. That’s why rooms with windows facing south are brighter than rooms with windows facing north. This is important for moss because the north sides of trees within the northern hemisphere are shadier and therefore wetter. The south sides of trees get more sunlight, so water evaporates faster there
Because saffron is so expensive it’s often mixed with other plants which are not actually saffron but are closely related to saffron to build up the bulk of the weight of a purchase. Turmeric is a primary example of a plant often used to help bulk up supplies. Distributors also use plastic as it helps add weight and eye appeal whilst actually providing nothing more than visual esthetics. Scientists can perform deoxyribonucleic acid examinations to determine if a sample is actually pure saffron or not. High quality saffron should have a humid scent which indicates that it was picked fresh. If the scent of saffron is slightly rancid, it means that it is old or of low quality