John Gertz
@astrojgertz.bsky.social
CEO, Zorro Productions | SETI Theorist 🔭
Author of Reinventing SETI (Oxford University Press, Aug 2025) | The search for extraterrestrial intelligence needs a reboot. 🚀
https://linktr.ee/astrogertz
Author of Reinventing SETI (Oxford University Press, Aug 2025) | The search for extraterrestrial intelligence needs a reboot. 🚀
https://linktr.ee/astrogertz
NASA’s Perseverance rover found organic molecules in Jezero Crater—once a Martian lakebed. A rock dubbed “Leopard Spots” may even show hints of past microbial life. Proof awaits sample return to Earth.
August 20, 2025 at 9:56 PM
NASA’s Perseverance rover found organic molecules in Jezero Crater—once a Martian lakebed. A rock dubbed “Leopard Spots” may even show hints of past microbial life. Proof awaits sample return to Earth.
Publication day is here! REINVENTING SETI is now available in print and Kindle editions.
amazon.com/Reinventing-...
#book #SETI #reinventingseti
amazon.com/Reinventing-...
#book #SETI #reinventingseti
August 11, 2025 at 10:21 PM
Publication day is here! REINVENTING SETI is now available in print and Kindle editions.
amazon.com/Reinventing-...
#book #SETI #reinventingseti
amazon.com/Reinventing-...
#book #SETI #reinventingseti
What if the only message ET ever sends is a cosmic warning: You move, you die? Read more at johngertz.com/blog.
August 1, 2025 at 7:43 PM
What if the only message ET ever sends is a cosmic warning: You move, you die? Read more at johngertz.com/blog.
July 24, 2025 at 12:38 AM
In my forthcoming book, I list the places where I think we would be most likely to find alien robotic probes within our Solar System. But how do we search for these probes?
Read more at johngertz.com/blog
Read more at johngertz.com/blog
July 18, 2025 at 4:55 PM
In my forthcoming book, I list the places where I think we would be most likely to find alien robotic probes within our Solar System. But how do we search for these probes?
Read more at johngertz.com/blog
Read more at johngertz.com/blog
Aliens with advanced tech could’ve spotted us not just from our early TV shows, but even from the time of the pyramids—welcome to the “I Love King Tut radius.” 👽📡 Curious? Dive deeper at johngertz.com/blog.
June 27, 2025 at 7:30 PM
Aliens with advanced tech could’ve spotted us not just from our early TV shows, but even from the time of the pyramids—welcome to the “I Love King Tut radius.” 👽📡 Curious? Dive deeper at johngertz.com/blog.
Business sense says ET would send probes, not broadcasts. And uploading the whole internet? Terrible move. Information should be bartered, not given away. #SETI
May 14, 2025 at 8:57 PM
Business sense says ET would send probes, not broadcasts. And uploading the whole internet? Terrible move. Information should be bartered, not given away. #SETI
We know exactly zero about alien intentions.
Kind? Cruel? Curious?
Even in direct contact, we may never understand their goals.
Remember The Twilight Zone episode How to Serve Man?
Turns out it was a cookbook.
We must proceed with caution.
#SETI #SpaceTheory #SciFiMeetsReality #AlienIntelligence
Kind? Cruel? Curious?
Even in direct contact, we may never understand their goals.
Remember The Twilight Zone episode How to Serve Man?
Turns out it was a cookbook.
We must proceed with caution.
#SETI #SpaceTheory #SciFiMeetsReality #AlienIntelligence
May 8, 2025 at 1:03 PM
We know exactly zero about alien intentions.
Kind? Cruel? Curious?
Even in direct contact, we may never understand their goals.
Remember The Twilight Zone episode How to Serve Man?
Turns out it was a cookbook.
We must proceed with caution.
#SETI #SpaceTheory #SciFiMeetsReality #AlienIntelligence
Kind? Cruel? Curious?
Even in direct contact, we may never understand their goals.
Remember The Twilight Zone episode How to Serve Man?
Turns out it was a cookbook.
We must proceed with caution.
#SETI #SpaceTheory #SciFiMeetsReality #AlienIntelligence
The scariest answer to Fermi’s Paradox?
We’re not alone. We’re one of two.
And the other is… insane. A berserker. A killer civilization.
Maybe robotic. Maybe AI.
Maybe we won’t know until the comets start coming directly toward Earth—
one after another.
#SETI #FermisParadox #TheGreatSilence
We’re not alone. We’re one of two.
And the other is… insane. A berserker. A killer civilization.
Maybe robotic. Maybe AI.
Maybe we won’t know until the comets start coming directly toward Earth—
one after another.
#SETI #FermisParadox #TheGreatSilence
May 2, 2025 at 1:05 PM
The scariest answer to Fermi’s Paradox?
We’re not alone. We’re one of two.
And the other is… insane. A berserker. A killer civilization.
Maybe robotic. Maybe AI.
Maybe we won’t know until the comets start coming directly toward Earth—
one after another.
#SETI #FermisParadox #TheGreatSilence
We’re not alone. We’re one of two.
And the other is… insane. A berserker. A killer civilization.
Maybe robotic. Maybe AI.
Maybe we won’t know until the comets start coming directly toward Earth—
one after another.
#SETI #FermisParadox #TheGreatSilence
1/ Sending signals from home is dangerous. ET doesn’t know our intent, or the intent of others who might intercept their signal.
So instead, they send probes—quiet, science-capable, and local.
So instead, they send probes—quiet, science-capable, and local.
May 1, 2025 at 1:06 PM
1/ Sending signals from home is dangerous. ET doesn’t know our intent, or the intent of others who might intercept their signal.
So instead, they send probes—quiet, science-capable, and local.
So instead, they send probes—quiet, science-capable, and local.
We're the cosmic newbies.
Any ET civilization we contact will almost certainly be far older and more advanced.
And the odds that they're also just ~100 years into tech like radio or lasers (like us)? Basically zero.
We’re the youngest civilization in the galaxy.
Any ET civilization we contact will almost certainly be far older and more advanced.
And the odds that they're also just ~100 years into tech like radio or lasers (like us)? Basically zero.
We’re the youngest civilization in the galaxy.
April 30, 2025 at 9:04 PM
We're the cosmic newbies.
Any ET civilization we contact will almost certainly be far older and more advanced.
And the odds that they're also just ~100 years into tech like radio or lasers (like us)? Basically zero.
We’re the youngest civilization in the galaxy.
Any ET civilization we contact will almost certainly be far older and more advanced.
And the odds that they're also just ~100 years into tech like radio or lasers (like us)? Basically zero.
We’re the youngest civilization in the galaxy.
1/ 📡 If we detected an alien signal today, should we respond?
Right now, there’s no plan. No process. No expert committee advising policymakers. No framework for a democratic decision.
Right now, there’s no plan. No process. No expert committee advising policymakers. No framework for a democratic decision.
April 7, 2025 at 4:11 PM
1/ 📡 If we detected an alien signal today, should we respond?
Right now, there’s no plan. No process. No expert committee advising policymakers. No framework for a democratic decision.
Right now, there’s no plan. No process. No expert committee advising policymakers. No framework for a democratic decision.
1/ SETI’s focus on electromagnetic signals has long been driven by the technology available to scientists like Frank Drake and Jill Tarter. But it’s time to rethink that approach. 🧵
📸: NRAO, NSF, and AUI
📸: NRAO, NSF, and AUI
March 31, 2025 at 5:30 PM
1/ SETI’s focus on electromagnetic signals has long been driven by the technology available to scientists like Frank Drake and Jill Tarter. But it’s time to rethink that approach. 🧵
📸: NRAO, NSF, and AUI
📸: NRAO, NSF, and AUI
1/ What if ET’s probes are already here, judging our sitcoms and news broadcasts? 👽📡 After watching the news, will they destroy us for being such a wretched species that poses a danger to the peace-loving civilizations of the galaxy? 😬
March 27, 2025 at 5:32 PM
1/ What if ET’s probes are already here, judging our sitcoms and news broadcasts? 👽📡 After watching the news, will they destroy us for being such a wretched species that poses a danger to the peace-loving civilizations of the galaxy? 😬
1/ 🧵 In 1961, Ronald Bracewell proposed a hypothesis that would change our understanding of extraterrestrial life. He suggested that alien civilizations might be sending probes to explore our solar system. 🚀 #SETI
March 26, 2025 at 10:01 PM
1/ 🧵 In 1961, Ronald Bracewell proposed a hypothesis that would change our understanding of extraterrestrial life. He suggested that alien civilizations might be sending probes to explore our solar system. 🚀 #SETI
🚀 I’m thrilled to announce that the preorder link for my new book, Reinventing SETI, is live! 📚
This book reimagines how we search for extraterrestrial intelligence and offers a fresh approach to SETI. Don’t miss out—preorder now and be part of the new wave of thought in space research! 🔗👇
This book reimagines how we search for extraterrestrial intelligence and offers a fresh approach to SETI. Don’t miss out—preorder now and be part of the new wave of thought in space research! 🔗👇
March 24, 2025 at 7:30 PM
🚀 I’m thrilled to announce that the preorder link for my new book, Reinventing SETI, is live! 📚
This book reimagines how we search for extraterrestrial intelligence and offers a fresh approach to SETI. Don’t miss out—preorder now and be part of the new wave of thought in space research! 🔗👇
This book reimagines how we search for extraterrestrial intelligence and offers a fresh approach to SETI. Don’t miss out—preorder now and be part of the new wave of thought in space research! 🔗👇
1/ 🚀 What Are ET Communication Nodes? 🌌
Advanced civilizations might use communication nodes—physical relays strung between around and between stars, forming the backbone of a vast galactic internet. 🛰️ #SETI
March 21, 2025 at 1:34 AM
1/ 🚀 What Are ET Communication Nodes? 🌌
Advanced civilizations might use communication nodes—physical relays strung between around and between stars, forming the backbone of a vast galactic internet. 🛰️ #SETI
Sending interstellar signals may not be ET’s best strategy for making contact with Earth. 🚀
Instead, they would send robotic probes to surveil Earth, studying life’s evolution from its microbial inception to humankind’s emergence as a technologically competent species.
Instead, they would send robotic probes to surveil Earth, studying life’s evolution from its microbial inception to humankind’s emergence as a technologically competent species.
March 18, 2025 at 5:32 PM
Sending interstellar signals may not be ET’s best strategy for making contact with Earth. 🚀
Instead, they would send robotic probes to surveil Earth, studying life’s evolution from its microbial inception to humankind’s emergence as a technologically competent species.
Instead, they would send robotic probes to surveil Earth, studying life’s evolution from its microbial inception to humankind’s emergence as a technologically competent species.
We don’t know 𝑛𝑜𝑡ℎ𝑖𝑛𝑔 about ET. One thing we know? ET is not obvious. That’s not just a mystery—it’s a fact. And it’s a pretty important one. #SETI #Aliens #FermiParadox #TheGreatSilence
March 7, 2025 at 12:21 AM
We don’t know 𝑛𝑜𝑡ℎ𝑖𝑛𝑔 about ET. One thing we know? ET is not obvious. That’s not just a mystery—it’s a fact. And it’s a pretty important one. #SETI #Aliens #FermiParadox #TheGreatSilence
SETI: The search for extraterrestrial intelligence. But what if our current approach is all wrong? Let’s take a hard look at what we’re doing—and what we should be doing instead. Welcome to a smarter search. 👽🔭
March 5, 2025 at 12:16 AM
SETI: The search for extraterrestrial intelligence. But what if our current approach is all wrong? Let’s take a hard look at what we’re doing—and what we should be doing instead. Welcome to a smarter search. 👽🔭