Ethan Siegel

Ethan Siegel

A theoretical astrophysicist and science writer, host of popular podcast “Starts with a Bang!”

Ethan Siegel Starts with a Bang!

Ethan Siegel is a Ph.D. astrophysicist and author of "Starts with a Bang!" He is a science communicator, who professes physics and astronomy at various colleges. He has won numerous awards for science writing since 2008 for his blog, including the award for best science blog by the Institute of Physics. His two books "Treknology: The Science of Star Trek from Tricorders to Warp Drive" and "Beyond the Galaxy: How humanity looked beyond our Milky Way and discovered the entire Universe" are available for purchase at Amazon. Follow him on Twitter @startswithabang.

Overhead view of athletes in starting blocks on a track, preparing for the fastest 100 meters. Marked lanes and starting lines are visible.
The all-time record is Usain Bolt's 9.58 seconds, set in 2009. What is the fastest time, ultimately, for an ideal human body?
A stopwatch appears normal on the left side while the right side is digitally warped, creating a distorted, wavy effect that makes you question, "Does time exist?
The passage of time is something we all experience, as it takes us from one moment to the next. But could it all just be an illusion?
JWST deep field vs hubble
From inside our Solar System, zodiacal light prevents us from seeing true darkness. From billions of miles away, New Horizons finally can.
Black and white sketch of a bald man with a long beard, wearing a suit and bow tie, looking to his left.
Adams was infamously scooped when Neptune was discovered in 1846. His failure wasn't the end, but a prelude to a world-changing discovery.
A robotic hand is centered against a blue background, surrounded by a green and blue circuit board pattern, symbolizing the intricate processes of math AI and why machines learn.
It's knowledgeable, confident, and behaves human-like in many ways. But it's not magic that powers AI though; it's just math and data.
For its 2-year science anniversary, JWST has revealed unprecedented details in "the Penguin and the Egg." Here are the surprises inside.
earth sun magnetic magnetosphere
As the Sun ages, it loses mass, causing Earth to spiral outward in its orbit. Will that cool the Earth down, or will other effects win out?