"With this new data, it now looks like we have a fairly solid object, " says Near radio science team leader Dr Donald Yeomans.

BBC: Eros is 'no ordinary rock'

She insisted on this part, and my father later backed her up: the magic was not just that the drum of a solid wood object without batteries rotated but that it did so only when unobserved, stopping whenever observed.

NEWYORKER: All That

Printing in 3D involves sending a design file to a printer that then forms a solid version of that object by slowly building it up in layers of plastic.

BBC: Nokia backs 3D printing for mobile phone cases