The Arecibo Message Decoded

In 1974, the Arecibo radio telescope transmitted a message to contact extraterrestrials. The message was designed by Frank Drake. Here's what it says.

00:00 Start
01:40 Magellan TV
02:35 History of the message and M13
04:35 How the message was sent
05:26 Message Structure
06:30 Decoding the first 10 numbers from binary
08:20 Atomic elements and DNA
09:41 Depiction of humanity and population
10:51 Depiction of Arecibo
11:36 Testing the message and dangers
14:00 We're disappearing
15:19 Possible signal detected?

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Watch next: Solar Orbiter Discovers Surprising new Phenomenon in the Sun
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[PorchPotatoMike]

And 22, 000 years from now an M13 radio astronomer will write “WOW!” on the margin of a piece of space paper, and nothing more will come of it.

[MrJohncobbjr]

The message was received and returned in a crop circle 27 years later. When I was in school everyone knew that we sent a message in space. This was so exciting. 27 years later when they answered in a Crop Circle hardly a word was said and I never saw it on the TV. Why explore in space if going to be censored info?

[NewMessage]

That collapse footage still makes me hold my breath for a few moments...

[tommymarreropr]

Thank you for this information... I live close by the observatory. Great loss.

[tziegner]

Correct, the 2001 crop circle (known as 'Arecibo Reply') was confirmed to be genuine by researchers and not a hoax. All crop circles can be analized to determine authenticity by analyizing the way the plant stems are "layed over" with an expulsion cavity and by other characteristics. Man-made crop circles do not have these atributes and are easy to identify as hoaxes.

[sarnav]

I recently found your channel, like 2-3 months ago, and I love it. Thank you for your great works and efforts on the videos!

[SquirrelASMR]

Christian Ready has the best presentation style out of all the major astronomy and physics channels. He always brings unique extra information that I dont normally see on all the other videos, which is very interesting and shows how much research he puts into creating such a well rounded and organized video

[robertmorgan]

You forget about another type of interception by an Alien Civilization of the Arecibo message. That would be if they are a Space Faring race(s), and one of their ships crossed the radio message’s path. They could translate it on the ship, investigate its origins, or pass it along to its own home World.
Or a combination of “all the above “!

[cosmonautonni]

My heart goes out to the astronomers who lost their jobs due to arecibo collapse. Thank you for this informative video. Its really good

[MrBendybruce]

I may never "know" if there is other life out there in the galaxy, or even in the universe but I choose to "believe" that there is, as it feels like an unbearable heartbreak to think that we are all there is, and will ever be. Nevertheless, the realist in me tends to think that life is like momentary flashes of light going off across the cosmos. There one moment, and gone the next, forever causally separated by the unimaginable vastness of time and space. Thankfully, we have imagination enough to visit the far off places in our minds, that we could never hope to visit otherwise.

[DingbatToast]

i'm surprised the "message" didn't contain adverts between each section

[maddengirl]

Why didn't you talk about the reply we got in the same format in the form of a crop circle?

[Skukkix]

lol I hope the history books will write: "civilized humans took over a million years to discover aliens, since the aliens just had cable."

[tripshh]

I am always excited about your videos ! Thank you for researching so intensely and explaining so well.

[ΓεωργιοςΖαλοκωστας-οδ]

Thank you very much for this really amazing crop circle!!😃😃

[waynepalmar]

Im alway fascinated by the stories that you bring to light and how you pleasantly weigh your words
Thank you

[SquirrelASMR]

You deserve a million subs at least! 🙏🧠 Thank you soo much for creating this beautiful content.

[ΓεωργιοςΖαλοκωστας-οδ]

Thank you very much for this great crop circle it is very useful!!

[patricknelson]

This is amazing, thanks for the breakdown!

[SquirrelASMR]

Ohhh thanks for the explanation. I'm a computer scientists and totally know binary, but never wouldve assume the marker system, but it seems so obvious once you mention it.