A cone-shaped portion of spacetime containing all (past) locations from which light could arrive at a particular location within spacetime (the tip of the cone). The tip can be reached from points ...

Reach up and turn around - great! The girl tries to make herself into a cone shape, and an image of a cone appears. A second girl starts to sing and other cones appear as she mentions them.

There is a common type of dust separator made in the DIY community, it has a cone-shaped body and is generally referred to as a cyclone-style. [Dror] built his own cyclonic dust collector out of ...