We don't understand the concept of time much at all.

A recent search for oddball supersymmetric particles, which could explain some of the weirdness of the universe, came up empty-handed.

Here's how we know the distant Oort Cloud exists.

The top quark is about 100 trillion times heavier than the up quark. But why?

There are some universal certainties. Death. Taxes. The second law of thermodynamics.

Mad scientists through the ages have dreamed of holding the world hostage by threatening to destroy the whole thing. Here's how that could work.

These tiny subatomic particles, showering down from the depths of space, continue to surprise (and annoy) physicists chasing them.

Brown dwarfs are cooler than stars but hotter than planets, and despite the name, they're not even very brown.

In the cosmos' most energetic events, we find some truly out-this-world methods of manufacturing radiation.

For the precocious hunter of off-Earth life, the Drake equation is the ever-ready, go-to toolkit for estimating just how (not) lonely humans are in the Milky Way galaxy. But it's not useful.

Magnets and the magnetic force are ubiquitous in our everyday lives, helping to guide us in unfamiliar territory and attach our kids' artwork to the fridge.

In 1980, physicist Alan Guth proposed a radical extension to the standard Big Bang model of the history of the universe, proposing a transformative event called cosmic inflation.

The "vanilla" Big Bang model, without any other additions or amendments, can't explain all the observations. Here's how it might have worked.

We've known for about 20 years that the expansion of our universe is accelerating, but how does the dark energy that causes it work?

Entanglement is one of the most confusing aspects of quantum mechanics — a field of physics that isn't exactly known to be clear-cut, sensible, common-sense or easy-to-understand.

At one time in the foggy, ill-remembered past, there were no stars.

So you've decided you want a piece of the rocket-building action to call your own. Well, read on.

Right now, as you read this very text, your DNA is getting sliced up by tiny, invisible bullets.

As good skeptics, we shouldn't immediately believe general relativity's tangle of mathematics at first blush. Instead, we need evidence. Good evidence.

Albert Einstein's theory of general relativity is a monumental achievement of human ingenuity, creativity and perseverance — to say the least.

Mysterious creatures called magnetic monopoles are predicted by our theories of the universe — so why has nobody seen them?

Deep in the sun's core, buried under hundreds of thousands of miles of twisting and convecting hydrogen and helium, a nuclear fire rages.

For most of us, seeing a dark sky means packing your bags and heading on an adventure.