Physicists have taken a bold step beyond Einstein's special theory of relativity, proposing an expansion of special ...

Albert Einstein had described the special theory of relativity in 1905. The result of Einstein's thinking about light, this theory introduced brand-new ideas to science. It opened up an entire ...

Einstein’s motivation to understand the nature of light began when he was just 16 years old. His theory of special relativity stemmed from his desire to understand the nature of light and what ...

During one such daydream, Einstein experienced what he would later call “the most fortunate thought of my life.” He knew that his 1905 special relativity theory applied only to the ...

It is an extension of Einstein’s special theory of relativity – but such a massive one that it took him 10 years, from 1905 to 1915, to get from one to the other. Special relativity tells us ...

Ten years before general relativity, Einstein came up with special relativity, which explained the relationship between space and time – and how they are related to each other. 'Special' means ...

During the latter part of the 20th century, string theory was put forward as a unifying theory of physics foundations. String ...

Einstein's theory of general relativity suggests that the "memory" of ancient events, such as black hole mergers, may be etched into the fabric of space-time by gravitational waves. New research shows ...

Here are a few thought experiments that demonstrate some of Einstein's most groundbreaking discoveries, including his special and general theories of relativity. What would happen if you chased a ...