Paul Halpern
@phalpern.bsky.social
Physicist and Science Writer. Author of eighteen books, most recently The Allure of the Multiverse: Extra Dimensions, Other Worlds, and Parallel Universes
Pinned
A holiday gift for those who have it all
The Allure of the Multiverse
An extraordinary voyage into the history of parallel universes, higher dimensions, and time travel in speculative science and imaginative fiction.
Available at:
amazon.com/Allure-Multi...
hachettebookgroup.com/titles/paul-...
The Allure of the Multiverse
An extraordinary voyage into the history of parallel universes, higher dimensions, and time travel in speculative science and imaginative fiction.
Available at:
amazon.com/Allure-Multi...
hachettebookgroup.com/titles/paul-...
Reposted by Paul Halpern
A holiday gift for those who have it all
The Allure of the Multiverse
An extraordinary voyage into the history of parallel universes, higher dimensions, and time travel in speculative science and imaginative fiction.
Available at:
amazon.com/Allure-Multi...
hachettebookgroup.com/titles/paul-...
The Allure of the Multiverse
An extraordinary voyage into the history of parallel universes, higher dimensions, and time travel in speculative science and imaginative fiction.
Available at:
amazon.com/Allure-Multi...
hachettebookgroup.com/titles/paul-...
November 25, 2025 at 12:36 PM
A holiday gift for those who have it all
The Allure of the Multiverse
An extraordinary voyage into the history of parallel universes, higher dimensions, and time travel in speculative science and imaginative fiction.
Available at:
amazon.com/Allure-Multi...
hachettebookgroup.com/titles/paul-...
The Allure of the Multiverse
An extraordinary voyage into the history of parallel universes, higher dimensions, and time travel in speculative science and imaginative fiction.
Available at:
amazon.com/Allure-Multi...
hachettebookgroup.com/titles/paul-...
Reposted by Paul Halpern
Tributes at Bryn Mawr College to the brilliant mathematician Emmy Noether, who spent her final years there. Noether revolutionized the methods of modern physics by identifying continuous symmetry groups with conservation laws. The third image is her grave marker.
#Science #Mathematics #Physics
#Science #Mathematics #Physics
November 12, 2025 at 11:57 AM
Tributes at Bryn Mawr College to the brilliant mathematician Emmy Noether, who spent her final years there. Noether revolutionized the methods of modern physics by identifying continuous symmetry groups with conservation laws. The third image is her grave marker.
#Science #Mathematics #Physics
#Science #Mathematics #Physics
Reposted by Paul Halpern
Annual holiday tradition:
Thanksgiving Turkey Feynman Diagram, drawn by particle physicist Yuhsin Tsai:
quantumdiaries.org/2009/11/26/t...
#HappyThanksgiving #LHC #physics
Thanksgiving Turkey Feynman Diagram, drawn by particle physicist Yuhsin Tsai:
quantumdiaries.org/2009/11/26/t...
#HappyThanksgiving #LHC #physics
November 20, 2025 at 8:45 PM
Annual holiday tradition:
Thanksgiving Turkey Feynman Diagram, drawn by particle physicist Yuhsin Tsai:
quantumdiaries.org/2009/11/26/t...
#HappyThanksgiving #LHC #physics
Thanksgiving Turkey Feynman Diagram, drawn by particle physicist Yuhsin Tsai:
quantumdiaries.org/2009/11/26/t...
#HappyThanksgiving #LHC #physics
Reposted by Paul Halpern
'Strange is our situation here upon earth.
Each of us comes for a short visit, not knowing why, yet sometimes seeming to divine a purpose..
There is one thing we do know: that man is here for the sake of other men.. upon whose well-being our own happiness depends.'
-Albert Einstein
#ScienceSky
Each of us comes for a short visit, not knowing why, yet sometimes seeming to divine a purpose..
There is one thing we do know: that man is here for the sake of other men.. upon whose well-being our own happiness depends.'
-Albert Einstein
#ScienceSky
November 20, 2025 at 8:51 PM
'Strange is our situation here upon earth.
Each of us comes for a short visit, not knowing why, yet sometimes seeming to divine a purpose..
There is one thing we do know: that man is here for the sake of other men.. upon whose well-being our own happiness depends.'
-Albert Einstein
#ScienceSky
Each of us comes for a short visit, not knowing why, yet sometimes seeming to divine a purpose..
There is one thing we do know: that man is here for the sake of other men.. upon whose well-being our own happiness depends.'
-Albert Einstein
#ScienceSky
Richard Feynman on String Theory:
'I have noticed when I was younger that a lot of old men in the field couldn’t understand new ideas very well...
I’m an old man now, and these are new ideas, and they look crazy to me, and they look like they’re on the wrong track.'
#Physics #Feynman #Science
'I have noticed when I was younger that a lot of old men in the field couldn’t understand new ideas very well...
I’m an old man now, and these are new ideas, and they look crazy to me, and they look like they’re on the wrong track.'
#Physics #Feynman #Science
November 25, 2025 at 12:38 PM
A holiday gift for those who have it all
The Allure of the Multiverse
An extraordinary voyage into the history of parallel universes, higher dimensions, and time travel in speculative science and imaginative fiction.
Available at:
amazon.com/Allure-Multi...
hachettebookgroup.com/titles/paul-...
The Allure of the Multiverse
An extraordinary voyage into the history of parallel universes, higher dimensions, and time travel in speculative science and imaginative fiction.
Available at:
amazon.com/Allure-Multi...
hachettebookgroup.com/titles/paul-...
November 25, 2025 at 12:36 PM
A holiday gift for those who have it all
The Allure of the Multiverse
An extraordinary voyage into the history of parallel universes, higher dimensions, and time travel in speculative science and imaginative fiction.
Available at:
amazon.com/Allure-Multi...
hachettebookgroup.com/titles/paul-...
The Allure of the Multiverse
An extraordinary voyage into the history of parallel universes, higher dimensions, and time travel in speculative science and imaginative fiction.
Available at:
amazon.com/Allure-Multi...
hachettebookgroup.com/titles/paul-...
Reposted by Paul Halpern
The Allure of the Multiverse
Expand your mind with a fantastic voyage into the strange history of parallel universes, higher dimensions, and time travel—from mystic musings to quantum conjectures and hidden realms beyond cosmic frontiers
www.amazon.com/Allure-Multi...
Expand your mind with a fantastic voyage into the strange history of parallel universes, higher dimensions, and time travel—from mystic musings to quantum conjectures and hidden realms beyond cosmic frontiers
www.amazon.com/Allure-Multi...
November 12, 2024 at 5:51 PM
The Allure of the Multiverse
Expand your mind with a fantastic voyage into the strange history of parallel universes, higher dimensions, and time travel—from mystic musings to quantum conjectures and hidden realms beyond cosmic frontiers
www.amazon.com/Allure-Multi...
Expand your mind with a fantastic voyage into the strange history of parallel universes, higher dimensions, and time travel—from mystic musings to quantum conjectures and hidden realms beyond cosmic frontiers
www.amazon.com/Allure-Multi...
'Strange is our situation here upon earth.
Each of us comes for a short visit, not knowing why, yet sometimes seeming to divine a purpose..
There is one thing we do know: that man is here for the sake of other men.. upon whose well-being our own happiness depends.'
-Albert Einstein
#ScienceSky
Each of us comes for a short visit, not knowing why, yet sometimes seeming to divine a purpose..
There is one thing we do know: that man is here for the sake of other men.. upon whose well-being our own happiness depends.'
-Albert Einstein
#ScienceSky
November 20, 2025 at 8:51 PM
'Strange is our situation here upon earth.
Each of us comes for a short visit, not knowing why, yet sometimes seeming to divine a purpose..
There is one thing we do know: that man is here for the sake of other men.. upon whose well-being our own happiness depends.'
-Albert Einstein
#ScienceSky
Each of us comes for a short visit, not knowing why, yet sometimes seeming to divine a purpose..
There is one thing we do know: that man is here for the sake of other men.. upon whose well-being our own happiness depends.'
-Albert Einstein
#ScienceSky
Richard Feynman and Julian Schwinger, two of the recipients of the 1965 Nobel Prize in Physics and both New Yorkers, were intellectual rivals
Schwinger would assert that he never used Feynman diagrams
Feynman would pretend to students that he couldn't pronounce Schwinger's name
#ScienceSky
Schwinger would assert that he never used Feynman diagrams
Feynman would pretend to students that he couldn't pronounce Schwinger's name
#ScienceSky
November 20, 2025 at 8:47 PM
Richard Feynman and Julian Schwinger, two of the recipients of the 1965 Nobel Prize in Physics and both New Yorkers, were intellectual rivals
Schwinger would assert that he never used Feynman diagrams
Feynman would pretend to students that he couldn't pronounce Schwinger's name
#ScienceSky
Schwinger would assert that he never used Feynman diagrams
Feynman would pretend to students that he couldn't pronounce Schwinger's name
#ScienceSky
Annual holiday tradition:
Thanksgiving Turkey Feynman Diagram, drawn by particle physicist Yuhsin Tsai:
quantumdiaries.org/2009/11/26/t...
#HappyThanksgiving #LHC #physics
Thanksgiving Turkey Feynman Diagram, drawn by particle physicist Yuhsin Tsai:
quantumdiaries.org/2009/11/26/t...
#HappyThanksgiving #LHC #physics
November 20, 2025 at 8:45 PM
Annual holiday tradition:
Thanksgiving Turkey Feynman Diagram, drawn by particle physicist Yuhsin Tsai:
quantumdiaries.org/2009/11/26/t...
#HappyThanksgiving #LHC #physics
Thanksgiving Turkey Feynman Diagram, drawn by particle physicist Yuhsin Tsai:
quantumdiaries.org/2009/11/26/t...
#HappyThanksgiving #LHC #physics
Reposted by Paul Halpern
One of Albert Einstein's best friends in his later years was mathematician Kurt Gödel, who found a strange rotating universe model that allowed for backward time travel, and presented it to him on his birthday.
Note that the idea was purely hypothetical, and has no known connection with reality.
Note that the idea was purely hypothetical, and has no known connection with reality.
November 16, 2024 at 10:22 PM
One of Albert Einstein's best friends in his later years was mathematician Kurt Gödel, who found a strange rotating universe model that allowed for backward time travel, and presented it to him on his birthday.
Note that the idea was purely hypothetical, and has no known connection with reality.
Note that the idea was purely hypothetical, and has no known connection with reality.
Tributes at Bryn Mawr College to the brilliant mathematician Emmy Noether, who spent her final years there. Noether revolutionized the methods of modern physics by identifying continuous symmetry groups with conservation laws. The third image is her grave marker.
#Science #Mathematics #Physics
#Science #Mathematics #Physics
November 12, 2025 at 11:57 AM
Tributes at Bryn Mawr College to the brilliant mathematician Emmy Noether, who spent her final years there. Noether revolutionized the methods of modern physics by identifying continuous symmetry groups with conservation laws. The third image is her grave marker.
#Science #Mathematics #Physics
#Science #Mathematics #Physics
Reposted by Paul Halpern
'The existence and validity of human rights are not written in the stars..
A large part of history is therefore replete with the struggle for those rights.. in which a final victory can never be won.
But to tire in that struggle would mean the ruin of society'
-Albert Einstein
#Einstein #Science
A large part of history is therefore replete with the struggle for those rights.. in which a final victory can never be won.
But to tire in that struggle would mean the ruin of society'
-Albert Einstein
#Einstein #Science
October 13, 2025 at 2:14 PM
Reposted by Paul Halpern
'I rarely think in words at all. A thought comes, and I may try to express it in words afterwards.'
-Albert Einstein
(From a conversation with psychologist Max Wertheimer in 1916)
#Einstein #science #physics #ScienceSky
-Albert Einstein
(From a conversation with psychologist Max Wertheimer in 1916)
#Einstein #science #physics #ScienceSky
June 5, 2025 at 1:49 PM
'I rarely think in words at all. A thought comes, and I may try to express it in words afterwards.'
-Albert Einstein
(From a conversation with psychologist Max Wertheimer in 1916)
#Einstein #science #physics #ScienceSky
-Albert Einstein
(From a conversation with psychologist Max Wertheimer in 1916)
#Einstein #science #physics #ScienceSky
Reposted by Paul Halpern
#MathSky #physics #astronomy It's great to find #scicomm specialist Paul Halpern on Bluesky! There are lots of good #scicomm accounts around, but Paul excels at being a storyteller. His books are fascinating, whether you are a STEM nerd or a nonscientist just looking for cocktail party topics.
Explore the history of one of the most provocative ideas in culture and controversial notions in theoretical physics, from Marvel movies and Rick and Morty to bubble universes and quantum weirdness.
Preorder your copy of The Allure of the Multiverse now:
www.amazon.com/Allure-Multi...
Preorder your copy of The Allure of the Multiverse now:
www.amazon.com/Allure-Multi...
November 2, 2023 at 2:31 PM
#MathSky #physics #astronomy It's great to find #scicomm specialist Paul Halpern on Bluesky! There are lots of good #scicomm accounts around, but Paul excels at being a storyteller. His books are fascinating, whether you are a STEM nerd or a nonscientist just looking for cocktail party topics.
Reposted by Paul Halpern
Ambivalent worlds:
John Wheeler’s hesitant parentage of the multiverse
By Paul Halpern
ilnuovosaggiatore.sif.it/article/383
#histstm #physics #science #sciencehistory
John Wheeler’s hesitant parentage of the multiverse
By Paul Halpern
ilnuovosaggiatore.sif.it/article/383
#histstm #physics #science #sciencehistory
December 21, 2024 at 8:53 PM
Ambivalent worlds:
John Wheeler’s hesitant parentage of the multiverse
By Paul Halpern
ilnuovosaggiatore.sif.it/article/383
#histstm #physics #science #sciencehistory
John Wheeler’s hesitant parentage of the multiverse
By Paul Halpern
ilnuovosaggiatore.sif.it/article/383
#histstm #physics #science #sciencehistory
Reposted by Paul Halpern
From the “Praise For Synchronicity” page of the book “Synchronicty” by Paul Halpern, PHD.
April 14, 2025 at 1:52 PM
From the “Praise For Synchronicity” page of the book “Synchronicty” by Paul Halpern, PHD.
Reposted by Paul Halpern
#RecommendedReading: “The Allure Of The Multiverse – Extra Dimensions, Other Worlds, and Parallel Universes” by Paul Halpern
August 18, 2025 at 8:46 PM
#RecommendedReading: “The Allure Of The Multiverse – Extra Dimensions, Other Worlds, and Parallel Universes” by Paul Halpern
Reposted by Paul Halpern
Reposted by Paul Halpern
"What's the multiverse?" Physicist Paul Halpern answers that question and explains why the far-out subject is so mesmerizing for scientists in the latest episode of the Fiction Science podcast. cosmiclog.com/2024/01/15/s...
Why scientists are mesmerized by the multiverse
The multiverse may be a cool (and convenient) concept for comic books and superhero movies, but why do scientists take it seriously? In a new book titled “The Allure of the Multiverse,”…
cosmiclog.com
January 15, 2024 at 5:41 PM
"What's the multiverse?" Physicist Paul Halpern answers that question and explains why the far-out subject is so mesmerizing for scientists in the latest episode of the Fiction Science podcast. cosmiclog.com/2024/01/15/s...
Reposted by Paul Halpern
Richard Feynman dressed as a Ladakhi monk, painted by Pasadena artist Sylvia Posner. The 'lightning bolt' he is clutching in his right hand resembles one of his scientific diagrams.
More about the costume parties Feynman attended: medium.com/starts-with-... #Feynman #Halloween #science #physics
More about the costume parties Feynman attended: medium.com/starts-with-... #Feynman #Halloween #science #physics
October 25, 2025 at 4:05 PM
Richard Feynman dressed as a Ladakhi monk, painted by Pasadena artist Sylvia Posner. The 'lightning bolt' he is clutching in his right hand resembles one of his scientific diagrams.
More about the costume parties Feynman attended: medium.com/starts-with-... #Feynman #Halloween #science #physics
More about the costume parties Feynman attended: medium.com/starts-with-... #Feynman #Halloween #science #physics
Reposted by Paul Halpern
Albert Einstein never worked in the Manhattan Project to create a nuclear weapon.
However, he did offer scientific advice to the U.S. Navy during World War II.
Here's an image of Einstein discussing his defense research with naval officers in 1943.
#Einstein #science #ScienceSky
However, he did offer scientific advice to the U.S. Navy during World War II.
Here's an image of Einstein discussing his defense research with naval officers in 1943.
#Einstein #science #ScienceSky
November 3, 2025 at 12:01 PM
Albert Einstein never worked in the Manhattan Project to create a nuclear weapon.
However, he did offer scientific advice to the U.S. Navy during World War II.
Here's an image of Einstein discussing his defense research with naval officers in 1943.
#Einstein #science #ScienceSky
However, he did offer scientific advice to the U.S. Navy during World War II.
Here's an image of Einstein discussing his defense research with naval officers in 1943.
#Einstein #science #ScienceSky
Reposted by Paul Halpern
Billionaires rapidly increase their wealth in the United States while poverty rises and life expectancy lowers. Meanwhile, military spending skyrockets, the federal deficit balloons, but relief for hunger is in limbo. Truly appalling:
www.theguardian.com/us-news/2025...
@marcuschown.bsky.social
www.theguardian.com/us-news/2025...
@marcuschown.bsky.social
Top 10 US billionaires’ collective wealth grew by $698bn in past year – report
Oxfam warns Trump policies risk driving inequality to new heights – but Democrats have also exacerbated wealth gap
www.theguardian.com
November 3, 2025 at 11:52 AM
Billionaires rapidly increase their wealth in the United States while poverty rises and life expectancy lowers. Meanwhile, military spending skyrockets, the federal deficit balloons, but relief for hunger is in limbo. Truly appalling:
www.theguardian.com/us-news/2025...
@marcuschown.bsky.social
www.theguardian.com/us-news/2025...
@marcuschown.bsky.social
'A wonder of this kind I experienced as a child of four or five years when my father showed me a compass. That this needle behaved in such a determined way did not at all fit [my preconceptions] ... This experience made a deep and lasting impression upon me.'
-Albert Einstein
#Einstein #Science
-Albert Einstein
#Einstein #Science
November 3, 2025 at 12:06 PM
Albert Einstein never worked in the Manhattan Project to create a nuclear weapon.
However, he did offer scientific advice to the U.S. Navy during World War II.
Here's an image of Einstein discussing his defense research with naval officers in 1943.
#Einstein #science #ScienceSky
However, he did offer scientific advice to the U.S. Navy during World War II.
Here's an image of Einstein discussing his defense research with naval officers in 1943.
#Einstein #science #ScienceSky
November 3, 2025 at 12:01 PM
Albert Einstein never worked in the Manhattan Project to create a nuclear weapon.
However, he did offer scientific advice to the U.S. Navy during World War II.
Here's an image of Einstein discussing his defense research with naval officers in 1943.
#Einstein #science #ScienceSky
However, he did offer scientific advice to the U.S. Navy during World War II.
Here's an image of Einstein discussing his defense research with naval officers in 1943.
#Einstein #science #ScienceSky