Why does E=mc2 (and why should we care?)

Why does E=mc2 (and why should we care?)

Bibliographic Details
Main Author: Cox, Brian
Other Authors: Forshaw, Jeff (Jeffrey Robert)
Format: Book
Language:English
Published: Cambridge, MA Da Capo Press c2009
Subjects:
Einstein field equation.
Special relativity (Physics) > Mathematics.
Space and time > Mathematics.