'We're going to be busy for a long, long time. This is an enormous amount of sample for us.' Scientists are now inspecting snagged, bagged and tagged bits and pieces from asteroid Bennu, the ...

The other three panels show progressively zoomed-in views of a fragment of the particle that split off along a bright vein containing phosphate, captured by a scanning electron microscope.

The kidneys then clear it out. Under the microscope, we see that these proteins form tiny spheres with calcium phosphate, which can still be broken down. But these spheres can also grow larger ...