Starts With A Bang

A dense starfield, with various colored stars shimmering through a dark cloud-like formation, lies against a deep black background in the mysterious zone of avoidance.
The Universe is out there, waiting to be discovered

Our mission is to answer the biggest questions of all, scientifically.

What is the 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 most of human history, these questions had no clear answers. Today, they do. Starts With a Bang, written by Dr. Ethan Siegel, explores what we know about the universe and how we came to know it, bringing the latest discoveries in cosmology and astrophysics directly to you.

with Ethan Siegel
Ethan Siegel is an award-winning PhD astrophysicist and the author of four books, including The Grand Cosmic Story, published by National Geographic.
Full Profile
A bald man with a long beard and handlebar mustache gestures with his hands against a backdrop of an upside-down cityscape wearing a purple shirt.
Groupthink in science isn’t a problem; it’s a myth
Scientists are notoriously resistant to new ideas. Are they falling prey to groupthink? Or are our current theories just that successful?

Ethan Siegel

solar system model
The Universe was born incredibly hot, and has expanded and cooled ever since. Could life have begun back when space was "room temperature?"
space expanding
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?
A person in a suit holds up a NOAA map showing the forecast track and intensity of Hurricane Dorian, reminding us that, unlike Einstein, we can't change the facts—only prepare for them—in an office setting.
Einstein is credited with saying, "If the facts don't fit the theory, change the facts." What he actually said has a very different meaning.
An image of an ancient black hole
At the center of Hubble's famous "cosmic horseshoe," a very heavy supermassive black hole has been robustly measured. How is it possible?
A person inspects a large, cylindrical section of a Higgs factory tunnel lined with metal pipes, cables, and equipment—a crucial site for particle physics research.
A next-generation collider is required for studying particle physics at the frontiers. Here's the fastest, cheapest way to get it done.
A dark, rocky planet orbits in space with the sun illuminating its edge, surrounded by stars and distant cosmic clouds.
In the search for life in the Universe, the ultimate goal is to find an inhabited planet beyond Earth. How will we know when we've made it?
parallel universe
Parallel universes are among the most profound notions in all of quantum physics. It's a compelling and fascinating idea, but is it true?