Inflation rates vary dramatically and fiscal deficits, which have been absent since the start of the oil boom in 2003, are about to re-emerge in some countries this year.
If you compare soils from a forest with soils that don't come from a forest, the amount of variability will most likely be greater in the forest's soil.
The range through these states is mediated by the arousal system, a network of tracts converging from sensory systems to integrating centers in the brain stem.
The wheel would need to withstand immense and constantly changing stresses as it rotated, so to make the structure more robust, the steel sections were bolted rather than welded together.
Now utopia has grown unfashionable, as we have gained a deeper appreciation of the range of threats facing us, from asteroid strike to epidemic flu and to climate change.