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.
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
We’ve now detected hundreds of gravitational waves with LIGO, Virgo, and KAGRA. What if we tried Weber’s original method in the modern day?
The first world beyond Earth for human habitability should be the Moon, not Mars. This is why we should terraform our lunar neighbor first.
Times dilate and lengths contract near the speed of light. Bizarre and confusing? Sure. But under relativity, it can’t be any other way.
Stellar streams are faint trails of stars that appear to “stream” out of galaxies. A new one, escaping galaxy M61, may point to many others.
When dying, Sun-like stars have binary companions, spectacular sights arise from the ionization. JWST spots the Red Spider Nebula in action!
There’s some, but not overwhelming, evidence that dark energy is evolving. What would it take for a “Big Crunch” to be our cosmic fate?
Scientists are notoriously resistant to new ideas. Are they falling prey to groupthink? Or are our current theories just that successful?
Physicist Daniel Whiteson challenges the notion that all intelligent species would eventually uncover the same laws of nature. Do you agree?
Nearly 100 years after being theorized, the strange behavior of the neutrino still mystifies us. They could be even stranger than we know.
The planet, the Solar System, and the galaxy aren’t expanding. But the whole Universe is. So where does the dividing line begin?
For 13.8 billion years, the Universe has been expanding. But that couldn’t have been the case for an eternity, and science has proven it.
Dark matter has never been directly detected, but the astronomical evidence for its existence is overwhelming. Here’s what to know.
We’ve long known we can’t go back to infinite temperatures and densities. But the hottest part of the hot Big Bang remains a cosmic mystery.
Red dwarfs are the Universe’s most common star type. Their flaring now makes potentially Earth-like worlds uninhabitable, but just you wait.
Found by Hubble before JWST’s launch, GNz7q looked like a mix of a galaxy and a quasar. Was it actually our first known “little red dot”?
Observations with the Hubble space telescope helped cement dark energy and reveal the Hubble tension. How are these two things so different?
The whole isn’t greater than the sum of its parts; that’s a flaw in our thinking. Non-reductionism requires magic, not merely science.
Solar power has the disadvantage that there’s no Sun at night. Satellite startup Reflect Orbital wants to change that, but at what cost?
Inflation’s two main criticisms, that it can predict anything and that the “measure problem” remains unsolved, can’t erase its successes.
The Orionids meteor shower peaks October 20th/21st here in 2025, coinciding with a new Moon. See the brightest shooting stars of the year!