By varying the conditions under which the spiders were kept (different reeling speeds, starvation periods), the species or the spiders inside the same species, it has been seen that
dragline silk has different mechanical properties and varies on an interspecific, intraspecific and intra-individual level [23].
In the first, peaks are dismantled, descending layer
by layer, using explosives and
draglines, and the coal harvested.