"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." For over a century, scientists ...

What if time were the only truly fundamental dimension of our Universe? A recent theory proposes a radically different vision of reality, where time has three dimensions. This approach challenges our ...

String theory found its origins in an attempt to understand the nascent experiments revealing the strong nuclear force. Eventually another theory, one based on particles called quarks and force ...

When it comes to understanding the fabric of the universe, most of what scientists think exists is consigned to a dark, murky domain. Ordinary matter, the stuff we can see and touch, accounts for just ...