Calculating the Journey The universe is vast, and it’s growing bigger by the second. Thanks to cosmic expansion, the distance to the edge of the observable universe is approximately 46.5 billion light ...

Add Yahoo as a preferred source to see more of our stories on Google. In space, there are four dimensions: length, width, height and time. scaliger/iStock/NASA via Getty Images Plus About a century ...

Let’s reimagine the walk of all walks. Not just a neighborhood stroll or a long-distance trek, but a bold journey to the universe’s edge. This isn’t your average hike—it’s an epic quest across time ...

(THE CONVERSATION) About a century ago, scientists were struggling to reconcile what seemed a contradiction in Albert Einstein’s theory of general relativity. Published in 1915, and already widely ...

Rob Coyne receives funding from the National Aeronautics and Space Administration (NASA) and the US National Science Foundation (NSF). About a century ago, scientists were struggling to reconcile what ...