Silly question, but does anyone know (from the top of their head) of a recent (say, 2013 to now) paper from either Nature or Science (related to physics ideally, but not necessarily) that has equal contributing authors? So the system with the asterisk and the subcaption stating "These authors contributed equally to this work". I know that it is something that is occurring more and more (and also accepted by Nature) and I have definitely seen it, but a recent example I somehow cannot find.