A startup backed by Goldman Sachs is measuring shadows from space to track the world's massive oil glut — and it's yielding shocking numbers that no one else has

· The world is awash in oil that nobody wants, causing storage tanks around the world to fill up and sending the price of US crude into negative digits for the first time in history. 
· Knowing exactly how much oil storage is available worldwide is valuable because the more supply, the cheaper the oil.
· Orbital Insight, a...