Note: I guess boffinry means nerdy scientific thinking in England.

Scientists carrying out extreme boffinry into the makeup of the Earth's liquid core have announced that they are very puzzled to find it is not made of what they had thought it was.

The great bulk of the liquid outer core of the planet, of course, is made of molten iron. That's just as well for us and all life on Earth, as the spinning blob of superhot melted metal we all live on top of generates a tremendously powerful magnetic field which keeps off all the plasma storms and cosmic rays and suchlike deadly space radiation so that we aren't fried out of existence on a routine basis.

But theory suggests that there must also be some lighter elements mixed in to the liquid comprising the outer core, otherwise it wouldn't be the density it is.

[link to www.theregister.co.uk]