3-sphere two 3-balls. This construction is analogous to a construction of a 2-sphere, performed by gluing the boundaries of a pair of disks. A disk is a 2-ball, and the boundary of a disk is a circle (a 1-sphere). Let a pair of disks be of the same diameter. Superpose them and glue corresponding points on their boundaries. Again one may think of the third dimension as temperature. Likewise, we may inflate the 2-sphere, moving the pair of disks to become the northern and southern hemispheres. After removing a single point from the 2-sphere, what remains is homeomorphic to the Euclidean
Sphere (2013 film) Sphere (2013 film) Sphere is a British animated short film created in 2013 by Aardman Animations for the University of Bristol and the Elizabeth Blackwell Institute. It was directed by Richard Webber. "Sphere " "involved asking members of the general public for their views on the technologies being developed in a project called SPHERE (Sensor Platform for HEalthcare in a Residential Environment), and what the outcomes might mean for them". As a result, "The creatures within the animation voiced opinions which reflected public reaction to SPHERE". "Sphere " was created in preparation for the launch of the Elizabeth Blackwell Institute.