The multiverse challenges science as we know it, and Hawking wasn’t pleased with it. But our journey to the edges of time has since reshaped our vision of the cosmos, and ourselves.
We take it for granted that gravity pulls things towards the Earth. But in reality this is just one of many explanations. And they are all equally made up.
The kilogram is the last international measurement standard that relies on a precisely crafted physical object. This standard-bearer will soon be replaced by space-age measurements based on physical constants.
Nearly two years ago, LIGO opened up a new window onto the cosmos when they discovered gravitational waves. But what has happened since and how could it change our understanding of space, time, and gravity?
