Trickle-down is the solution (to the planetary core formation problem)
December 4, 2017
Scientists have long pondered how rocky bodies in the solar system — including our own Earth — got their metal cores. According to research conducted by The University of Texas at Austin, evidence points to the downwards percolation of molten metal toward the center of the planet through tiny channels between grains of rock.
Science Daily, Dec.4, 2017