Global cities are identified and ranked by a combination of

Started in 2008, the Global Cities index was created to compare the top cities of the world based on a set of criteria including: business activity, human capital, infrastructure, information exchange, cultural experience and political engagement.

Each of those major criteria are then broken-down into various metrics on which each city is scored.

In 2018, New York City dominated the business activity and human capital categories.

a mid-ocean ridge or mid-oceanic ridge is an underwater mountain range, formed by plate tectonics. this uplifting of the ocean floor occurs when convection currents rise in the mantle beneath the oceanic crust and create magma where two tectonic plates meet at a divergent boundary.a geomagnetic reversal is a change in a planet's magnetic field such that the positions of magnetic north and magnetic south are interchanged.

italy:

classic, nostalgic, romantic and beautiful. no place better than italy or sicily.