When Tom Marshburn floated back to Earth after months on the International Space Station, his skin carried stories no photo could capture thinner texture, slower-healing scrapes, and a dryness that ...

Manganese heptoxide (Mn₂O₇) is a curious and terrifying inorganic oxide: dark, oily, and dangerously explosive. In this video we explain what it is, why it forms, and most importantly why chemists ...