Not flat shapes like circles and squares, but solid shapes like cubes and cones ... GIRL 1: Now the next shape is a sphere. Try to make yourself into a sphere – a big ball!

The Earth's inner core, long considered a solid and stable sphere, may be quite different ... causing changes in shape. These disturbances could also explain the gradual slowdown in the rotation ...

[DaveMakesStuff] demonstrates a great technique for 3D printing a sphere; a troublesome shape for filament-based ... at a higher temperature to ensure solid bonding between each layer.

A ring or sphere could ... rings can’t be a uniform solid. Instead, they must be a collection of rocks or ice or other space stuff, all held together in a ring shape by gravity and other ...