The rivalry between Jeff Bezos and Elon Musk now runs from the kerbside to deep space, and last week Bezos pressed it on both fronts. Amazon-owned Zoox said its driverless taxis had carried more than half a million riders, while its space company, Blue Origin, kept pushing its case to build a communications orbiter at Mars for NASA by 2028. Zoox Hits 500,000 Free Rides as Waymo Pulls Away The Zoox news came on 24 June, when the company unveiled …