Ethan Siegel

The most important lesson from JWST's "baby Milky Way". The Firefly Sparkle galaxy was only spotted because of gravitational lensing's effects.

It's rare that a book comes along that changes the way experts in their field think about the fundamentals, while simultaneously being accessible and informative to those without expert knowledge…

On a frosty winter's night more than 2,000 years ago, a young expectant mother found herself in a wooden manger as she prepared to give birth.

In a year where science stories seemed to be dominated by rocket launches, hype surrounding artificial intelligence and quantum computing, and how political meddling threatens the enterprise of…

If you examine the Universe extremely closely, by probing the fundamental entities with it on the smallest possible scales, you'll discover that reality is fundamentally quantum in nature. Matter…

The Universe is a vast place, filled with more galaxies than we've ever been able to count, even in just the portion we've been able to observe.

Someday, if nature is kind to us, we'll make the grandest discovery of all: that we aren't alone in the Universe. While various observatories and space missions might someday soon find life on other…

When it comes to any aspect of the Universe, there are two questions we always attempt to answer: "What is it like today?" and "how did it become the way it is?"

Personalised advertising and content, advertising and content measurement, audience research and services development

In the year 2000, physicists created a list of the ten most important unsolved problems in their field. 25 years later, here's where we are.