Calculations imply that the main silicate compound deep in terrestrial planets should dissociate to MgO and SiO2 at high pressures characteristic of planets larger than Earth.

Comparison of asexual and sexual strains of the water flea show that asexual reproduction leads to more deleterious mutations, confirming the advantage of sex.

Microbial sulfur oxygenase reductase, a major contributor to the global sulfur cycle, forms a 24-subunit hollow sphere with channels that provide access to the active sites inside.