The top quark is about 100 trillion times heavier than the up quark. But why?
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.
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.
At 13.8 billion years ago, our entire observable universe was the size of a peach and had a temperature of over a trillion degrees.
Albert Einstein's vision for how gravity works was, to say the least, a radical departure from the older, Newtonian perspective.
To visit a truly strange land full of wonder and mystery, all you have to do is crack open your microscope case and look down, down, down.