Fifty teams of undergraduate and graduate students from around the world will demonstrate their lunar excavator robots May 20 - 24 at NASA's Kennedy Space Center in Florida. Practice sessions for the fourth annual Lunabotics Mining Competition will take place May 20 - 21, followed by the official competition. Media representatives are invited to cover the event on Wednesday, May 22 from 12 - 4 p.m. EDT, at the Kennedy Space Center Visitor Complex.