Science news this week: An enigmatic human relative, dark matter discovery and mysterious lights in the sky during nuclear weapons tests - Live Science

Science news this week: An enigmatic human relative, dark matter discovery and mysterious lights in the sky during nuclear weapons tests  Live ScienceEarly hominin Australopithecus afarensis may not be our human ancestor after all  Natural History MuseumMystery foot suggests a second early human relative lived alongside Lucy  NBC NewsNew finds shed light on diet and locomotion in Australopithecus deyiremeda  NatureTwo Australopithecus Species Co-Existed in