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Investors on the lookout for startups working at the frontiers of technology are casting their nets ever further into unchartered territory, sometimes literally as well as figuratively. In one of the latest examples, a startup called Karman+ with ambitions to build autonomous spacecraft that can travel to asteroids and then mine them for materials has now raised $20 million in a seed round that it will be using to get itself to its next stage of hardware and software development.
