His theory of special relativity stemmed from his desire to ... According to this equation, mass and energy are ...

and become distorted by objects with mass. Ten years before general relativity, Einstein came up with special relativity, which explained the relationship between space and time – and how they ...

Special relativity tells us motion warps space and ... that falling objects accelerated at the same rate regardless of their mass. Famously, a feather and a hammer dropped from the Leaning Tower ...