Tim Grove is a geologist interested in the processes that have led to the chemical evolution of the Earth and other planets including the Moon, Mars, Mercury, and meteorite parent bodies. His approach to understanding planetary differentiation is to combine field, petrologic, and geochemical studies of igneous rocks with high pressure, high temperature experimental petrology. On Earth his research focuses on mantle melting and subsequent crustal-level magma differentiation at both mid-ocean ridges and subduction zones. For mid-ocean ridges, he is interested in the influence of mantle convection and lithospheric cooling on melt generation and modification. In subduction zone environments, he is interested in understanding the critical role of H2O on melting and differentiation processes. On the Moon, his work focuses on understanding the chemical differentiation of the early lunar magma ocean and the subsequent remelting of its cumulates to create lunar mare basalts. He applies his experimental approach to meteorites from the earliest formed planetesimals in our Solar System to understand the melting and chemical differentiation processes that occurred in these asteroidal bodies.