But it's clear Gardner views himself as a natural center fielder, one who will never be as fluid in left field, despite his success at the position.

WSJ: In the Center of Yankee Change

The research could help test simulations of how the outer, fluid core generates the Earth's magnetic field, which shields our planet and the teeming life on it from harmful cosmic rays.

BBC: NEWS | Science/Nature | Earth's core runs ahead of crust

Both countries play versions of the 4-2-3-1 formation that dominates the game at the highest level and both use fluid movement, technically skilled players and heavy pressing to lean on opponents all over the field.

WSJ: Like for Like Among Old Rivals