Our weekly news round-up: NASA will send an orbiter to Psyche, a solid metal asteroid 200km in diameter; Oldest micro-fossils of early life found in Quebec; Trump moves to wind back Obama's limits on tail pipe emissions; 'March For Science' builds huge support from disgruntled American scientists; John Goodenough, the 94 year old inventor of the lithium ion battery, develops new solid state battery tech; Samsung patents 'bezel-less' display; Successful Snapchat IPO raises US$3.4 billion.