Daniel du Toit Malcolm Hartley 2019 C-League Pollux (star) Proxima Centauri History of the petroleum industry C/2012 E2 (SWAN) List of numbered comets Comet NEOWISE Jacques Brel Glyptodon Quantum supremacy Lakes on Mars Quantum machine learning 80P/Peters–Hartley Cystic fibrosis 2020 in paleomammalogy List of postage stamps of Guernsey 276P/Vorobjov