Mining Rush in Outer Space?

The quest to mine asteroids commercially has begun

Last year, a startup called Planetary Resources backed by a bunch of billionaires announced plans to send robotic ships into outer space to mine asteroids.

Today, a startup called Deep Space Industries that is apparently not backed by any billionaires announced plans to send robotic ships into outer space to mine asteroids, refuel spacecraft and satellites, and 3-D print solar power stations to beam clean energy back to Earth.