The methods of analyzing space, time and motion described in the previous several lectures are called kinematics. Galileo rightly deserves much of the credit for developing these methods. [Although ...

This is the third part of a four-part series on Einstein’s scientific contributions. Part one was published on July 11 and part two on July 12. Part four will be published on July 14. Einstein was, ...

You say there is no such thing as “centrifugal force” (1 March, p 47). Yes, there is – in the right frame of reference. There is, of course, no centrifugal force in an inertial frame of reference (in ...