The easiest way to think about a trackball mouse is by imagining an old-school mouse with a ball on the bottom. Before there were optical mice that use a tiny camera and digital image processing ...

What's that? A ball of steel? It's actually the OreObject SPHEREtouch mouse, and yes, it's essentially a handcrafted ball of steel, albeit touch-enabled, and functions as a mouse.

Reader John Boyd finds that his Mighty Mouse is disinclined to scroll. He writes: The scroll ball on my Might Mouse has stopped working yet again. I’ve tried turning it upside down, etc.

And right now, the best wireless gaming mouse is the Razer Deathadder V3 HyperSpeed ... Dave has been mousing since the grinty ball days of the Amiga and was converted to the claw grip the ...