A century after the birth of quantum mechanics, no one is sure what it is telling us about the nature of reality — and Lee Smolin's book adds to a stream of excellent works on the topic.
Despite the incredibly accurate predictions of quantum theory, there's a lot of disagreement over what it says about reality — or even whether it says anything at all about it, says guest Adam Becker.
Hold out your hand for a century, and 100 million particles of dark matter will pass through each second without leaving a trace. Still, a physicist in South Dakota thinks he may be able to catch one.
