Radar experiment from earth says, Mercury has molten core

Chefs have long used a simple trick to differentiate between a raw and hard – boiled egg. By spinning an egg and watching how it behaves when the spin is disrupted, its easy to tell whether its interior is solid or liquid.A radar signal is transmitted from the GoldStone antenna and at the Robert C Byrd telescope in Green Bank. Applying a similar test to the planet Mercury, ostronomers have found strong evidence that the planet closest to the sun has a fluid core.

 

"liquid hot MAGMA" ~ Dr. Evil


I'm surprised they did not know this already and furthermore what implications does it have if any?

interesting that they were able to determine this from the chef trick though