The Universe is out there, waiting for you to discover it.
Our mission: to answer, scientifically, the biggest questions of all.
- What is our Universe made of?
- How did it become the way it is today?
- Where did everything come from?
- What is the ultimate fate of the cosmos?
For countless generations, these were questions without resolutions. Now, for the first time in history, we have scientific answers. Starts With A Bang, written by Dr. Ethan Siegel, brings these stories — of what we know and how we know it — directly to you.
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Featured
Why power generated through nuclear fusion will be the future, but not the present, solution to humanity’s energy needs.
It’s a strange idea to consider: that a tiny building block of matter, the atomic nucleus, holds the greatest potential for energy release.
And yet, it’s true; while electron transitions in atoms or molecules typically release energy on the order of ~1 electron-Volt, nuclear transitions between different configurations release energies a million times as great, on the order of ~1 Mega-electron-Volt.
Popular
From before the Big Bang to the present day, the Universe goes through many eras. Dark energy heralds the final one.
A wild, compelling idea without a direct, practical test, the Multiverse is highly controversial. But its supporting pillars sure are stable.
The surface and atmosphere is colored by ferric oxides. Beneath a very thin layer, mere millimeters deep in places, it’s not red anymore.
The first supernova ever discovered through its X-rays has an enormously powerful engine at its core. It’s unlike anything ever seen.
Just 13.8 billion years after the hot Big Bang, we can see 46.1 billion light-years away in all directions. Doesn’t that violate…something?
All Stories
The story of John Couch Adams, “the man who failed to discover Neptune,” and his cosmic redemption. Perhaps its human nature to want to only think positive thoughts about our […]
Three great things all align this August, making the Perseids a can’t-miss show. Here’s how to take advantage. When it comes to meteor showers, we have these dazzling pictures in […]
One moment, every particle in the Universe was massless. Then, they weren’t anymore. Here’s how it happened. In the earliest stages of the hot Big Bang, the Universe was filled […]
The hallmark of a good scientist is changing your mind when new evidence arises. Here’s what that looks like. Science, like many things in life, is always a work-in-progress. While a […]
Mars will never look as big as the full Moon. But it isn’t even the biggest planet. From humanity’s perspective, the Sun and Moon always dominate Earth’s skies. The Moon and […]
Perhaps energy isn’t conserved at all in an expanding Universe. If you have a Universe full of stuff — whether that’s atoms, dark matter, radiation, neutrinos, or anything else — it’s virtually impossible to […]
It’s one of the biggest assumptions we’ve ever made about the Universe. Here’s why it’s wrong. Almost everyone has heard the story of the Big Bang. But if you ask anyone, […]
Dark matter feels fake. MOND sounds plausible. What should you conclude? Imagine I told you that everything you ever saw, touched, or experienced — in this world and in the Universe beyond — was […]
Gazing upon the red, blood Moon during totality is only part of the wonders awaiting you. On July 27, 2018, the longest total lunar eclipse of the century took place. Totality […]
Fill up your gas tank, no matter how hot it is, with confidence and safety from anywhere on Earth. For most of the northern hemisphere, summer is in full swing. Along […]
It wasn’t just the Milky Way and Andromeda two billion years ago. Here in the Local Group, our two largest galaxies dominate: Andromeda and the Milky Way. Our Local Group of […]
It’s one of the most common tropes in science fiction. But which movies actually get the science right? The way we travel through time, at a speed of one second per […]
Did the Universe begin at time t=0? Did space and time emerge from that? The Universe, today, is expanding and cooling, as the volume of the Universe increases while the number […]
If our current laws of physics can’t predict what will happen, even probabilistically, we need something new. There are two theories we have that explain all the particles and their […]
Humanity’s greatest-ever view of the Big Bang’s leftover glow has just released their final analysis. Here’s what we’ve learned. It’s been more than 50 years since humanity discovered a uniform bath […]
The Universe was born with equal amounts of matter and antimatter. How did matter win? 13.8 billion years ago, at the moment of the Big Bang, the Universe was the hottest […]
Our best physical theories predict that a multiverse exists. But if we can’t test it, is it really scientific? The Universe is all there ever was, all there is, and […]
A new set of images from NASA’s Chandra X-ray observatory shows us what we’ve never seen before. The Pillars of Creation, 7,000 light years away in the Eagle Nebula, represents one […]
If we know how big the observable Universe is, why can’t we figure out how big the unobservable part is? 13.8 billion years ago, the Big Bang occurred. The Universe was […]
The most unusual star known has finally had its dimming scientifically explained. Here’s the unusual, dusty resolution. The science of planet-hunting has truly taken off in the 21st century, with […]
In 1987, we detected neutrinos from another galaxy in a supernova. After a 30 year wait, we’ve found something even better. One of the great mysteries in science is determining not […]
Immediately after the Big Bang, the Universe was more energetic than ever. What was it like? When we look out at the Universe today, we see that it’s full of stars […]
Before there were gravitational waves, multi-messenger astronomy got its start with the neutrino. Sometimes, the best-designed experiments fail. The effect you’re looking for might not even occur, meaning that a […]
The brightest galaxies of all neither have the most stars nor the biggest black holes. Here’s how to solve the mystery. With some 400 billion stars burning steadily, the Milky Way […]
How ‘special’ are we for life to have survived and thrived the way it did? While there are hundreds of billions of stars in our galaxy, many with Earth-sized planets at […]
Finding the ingredients for life is a very different prospect than finding the products of life. Perhaps the greatest quest in science today is to find life that originated beyond Earth. […]
North Korea’s statements, actions, and the physics of how to do it all point to the same terrifying conclusion. There are few things in this world that have the capability […]
13.8 billion years ago, our Universe as-we-know-it came into existence. Here’s what it was like. Looking out at our Universe today, we not only see a huge variety of stars and […]
There’s a halo of dark matter permeating every galaxy, and that means its particles pass through us, too. The Universe, despite all the planets, stars, gas, dust, galaxies, and more we […]
Forget the spectacular explosions we create here on Earth. The Universe outdoes us in every way imaginable. Forget mere chemical reactions; in space, matter-energy conversion creates unprecedentedly powerful explosive events. […]