TerraFirma's semi-autonomous construction equipmentCourtesy: TerraFirmaAs SpaceX's Elon Musk sells investors on a space economy with life beyond Earth, a two-year-old construction startup founded by two of the company's former engineers is positioning itself for the future of interplanetary infrastructure. TerraFirma on Tuesday said it raised $115 million in a funding round with investments from Kleiner Perkins, Bain Capital Ventures, and angel investors tied to defense tech companies SpaceX, An...