The bulk elemental composition of Earth can’t be fully explained by compositional differences in its initial building blocks, according to a new study by Paul Frossard and colleagues. Instead, they ...

What is the chemical composition of the Earth’s interior? Because it is impossible to drill more than about ten kilometres deep into the Earth, volcanic rocks formed by melting Earth’s deep interior ...

By comparing the amount of lithium and potassium with the other elements they detected - sodium and calcium - they found that the ratio of elements matched the chemical composition of the crust of ...