Planetary Resources and the age of asteroid mining

John Mankins, a 25-year Nasa veteran.
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Many asteroids are in Earth-like orbits which offer accessible resources. -
Planetary Resources has developed the Leo space telescope with remote sensing... -
Chris Lewicki, chief engineer and CEO of Planetary Resources. -
Nasa Space Systems engineer Rob Mueller. -
Planetary Resources sees mining asteroids as a way of lowering costs of space... -
Swarms of robotic spacecraft will enable extraction of resources from... -
John Mankins, a 25-year Nasa veteran. -
Water in space is presently worth more than $22,000 a litre and is contained...