Issue 2 H – Krystin Unverzagt and Philipp Verpoort He – Marina Peterson C – Emily Mathis Kr – Alison Heru Y – Yoonha Kim Tc – Anke Gruendel Ag – Gretchen Bakke Nd – Cymene Howe Er – Michelle Atherton Ta – Kathleen Stewart Bi – Hannah Hopkins Pa – Tomás Criado U – C. Samuel Rees SiO2+Se – Danny Fisher NaCl+Mg – Gretchen Henderson