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Light
Starts With A Bang!
The Universe is out there, waiting for you to discover it.
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Light
Ethan Siegel
in
Starts With A Bang!
Apr 29
If photons have mass, could they explain dark matter?
Our Universe requires dark matter in order to…
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775
6 responses
Ethan Siegel
in
Starts With A Bang!
Apr 23
Does light itself truly have an infinite lifetime?
In all the Universe, only a few particles are…
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1.3K
19 responses
Ethan Siegel
in
Starts With A Bang!
Feb 28
The surprising origins of wave-particle duality
Everything acts like a wave while it propagates, but…
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1.6K
14 responses
Ethan Siegel
in
Starts With A Bang!
Nov 2, 2023
Light and gravitational waves don’t arrive simultaneously
In 2017, a kilonova sent light and…
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2.1K
21 responses
Ethan Siegel
in
Starts With A Bang!
Aug 4, 2023
Ask Ethan: How does light escape from a black hole?
Nothing can escape from a black hole. So where do…
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605
2 responses
Ethan Siegel
in
Starts With A Bang!
May 24, 2023
What color is the Sun? An astrophysicist answers
Some say that the Sun is a green-yellow color, but…
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164
1 response
Ethan Siegel
in
Starts With A Bang!
Apr 27, 2023
Why do mirrors flip left-and-right but not up-and-down?
If you look into a mirror, you’ll notice that…
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1.3K
25 responses
Ethan Siegel
in
Starts With A Bang!
Aug 19, 2022
Ask Ethan: Why can’t dark matter be made of light?
There’s an extra source of massive “stuff” in our…
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281
Ethan Siegel
in
Starts With A Bang!
Aug 12, 2022
Ask Ethan: Does light really live forever?
In all the Universe, only a few particles are eternally…
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848
14 responses
Ethan Siegel
in
Starts With A Bang!
Jul 27, 2022
The only way to beat the speed of light
There’s a speed limit to the Universe: the speed of light in…
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787
16 responses