Chapter 1: What significant events shaped Richard Feynman's life?
The physicist Richard Feynman once explained where fire comes from. And the light and heat that's coming out, that's the light and heat of the sun that went in.
So it's sort of stored sun that's coming out
when you burn a log. The wildfires that hit Los Angeles last year burned down the house where Feynman and his family lived in Altadena. It was near the Caltech campus where he had taught for decades. Fire also destroyed Zorthian Ranch up in the hills where Feynman loved to spend time. Those losses are regrettable, but they were just property.
Feynman left a mark on the world that runs much deeper than mere property. In 2024, we made a three-part series called The Curious, Brilliant, Vanishing Mr. Feynman. And I thought now might be a good time to replay that series for you. Today, part one, The Curious Mr. Feynman. I hope you enjoy.
So a little scrap of paper and my dad's writing. He had a weird way of working where he would just write on like, if he ran out of paper or something, he would grab a Kleenex box or write on the corners of junk mail or wherever there was clear space.
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Chapter 2: How did Feynman's involvement in the Manhattan Project influence his career?
That is Michelle Feynman. Her father is the late Richard Feynman, a theoretical physicist who taught for decades at Caltech, the California Institute of Technology in Pasadena. And that's where we are today in a climate controlled underground archive going through her father's files. Feynman led an unusual and unusually eventful life.
While he was still in graduate school, he was recruited to join the Manhattan Project, the U.S. military's secret program to build an atomic bomb. Toward the end of his life, he was asked to join a presidential commission to investigate the explosion of the Challenger space shuttle. NASA had launched the Challenger from Cape Canaveral, Florida, on a cold January day in 1986.
It was in the air only 73 seconds before it exploded on live TV. All seven crew members were killed, including a schoolteacher named Krista McAuliffe.
I remember being in history and we didn't take our test and they said that a terrible thing had happened. And then I came home and my parents, who rarely had the television on, were in front of the television. They seemed pretty distraught by the whole thing. And then I guess he got a call inviting him to be part of the commission.
This commission was ordered by President Ronald Reagan.
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Chapter 3: What role did Feynman play in the Challenger investigation?
Feynman's wife, Gwyneth, urged her husband to accept the invitation. He was disinclined. Physics, he loved. Solving theoretical mysteries? No. He loved. It was the politics he hated. Feynman was now 67 years old, and he'd been sick for a while with cancer. Sometimes he was surprised he was still alive and grateful. But the idea of spending months in Washington seemed worse than death.
President Reagan had asked former Secretary of State William Rogers to run the commission. Whatever you do, Reagan told him, don't embarrass NASA. As for Richard Feynman... Embarrassment wasn't something that he really worried about.
I think it was really ultimately my mom who said, OK, let's be honest.
Chapter 4: What were the challenges Feynman faced during the investigation?
If you don't do it, they'll all be doing the same thing. And if he did it, there would be this one other person sort of buzzing around and trying to really find out what happened.
Feynman thought about it for a while. Finally, he accepted. Here's how he put it to his wife. Okay, I am going to commit suicide for six months. But once he took the assignment, he attacked it, visiting engineers across the country to learn everything he could about how the space shuttle worked.
Feynman wasn't a rocket scientist, but he had helped build the atomic bomb at Los Alamos, and he had won a Nobel Prize for his work in quantum electrodynamics. Among his physicist peers, he was thought of as a wizard. Freeman Dyson said that Feynman had the most original mind of his generation. He was also perhaps the world's most famous living scientist.
So, yes, Richard Feynman was a logical choice to serve on this presidential commission, but he was also a risky choice.
I do know that there was somebody on the commission that he didn't like, or he thought the person didn't like him, and there were disagreements.
Feynman grew concerned that this investigation would be more of a show trial, political propaganda meant to save face. The US was still fighting a cold war with Russia, and the American space program was a key asset.
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Chapter 5: How did Feynman's unique approach to science impact his findings?
Most of the 12 members of the commission were political or military appointees. Feynman worried that Chairman Rogers would try to sideline him, maybe even withhold information. But having spent a lifetime teaching physics at Caltech,
Feynman had no shortage of former students now working for NASA and at NASA's Jet Propulsion Lab, which is at Caltech, just down the road from Feynman's archives, where we are today.
So I'm wondering what this is, like who gave him this piece of paper? And then he made notes on it. Space shuttle operations entail a significant degree of risk. And then that's circled. And then what do you think? Oh, what do you think the magnitude of the risk is?
The magnitude of the risk, Feynman learned, varied greatly depending on who you asked. NASA management had put the risk of a shuttle disaster at around 1 in 100,000. Feynman thought this was absurd. It implied, as he later wrote, that you could put a shuttle up every day for 300 years expecting to lose only one.
The engineers at NASA, the people responsible for actually building and knowing the thing, they put the risk of a disaster at 1 in 100,000.
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Chapter 6: What personal struggles did Feynman endure after World War II?
The engineers, for all their technical ability, they knew this was still a dangerous enterprise. Feynman wrote, what is the cause of management's fantastic faith in the machinery?
This section describes possible shuttle accidents leading to catastrophic failure. And then he's got some notes in the margins.
In Washington, the commission began to interview witnesses. Feynman didn't think Chairman Rogers was trying very hard to get to the true cause of the explosion. So Feynman began asking questions, sharp, unrelenting questions, questions about the science. During a break, Chairman Rogers was overheard in the men's room complaining to the astronaut Neil Armstrong, who also sat on the commission.
He said, Feynman is becoming a real pain in the ass. Feynman, known in these archival documents as RPF, felt the investigation was becoming a whitewash.
Right. RPF calls Graham again, do something, feel frustrated and miserable.
Serving on the commission had been as dreadful an experience as Feynman had feared, but he kept digging. By now, he had come to believe that the Challenger exploded because of the failure of what are called O-rings, small circular seals designed to prevent fluid or air from leaking during a mechanical process.
The solid rocket boosters on the Challenger contained O-rings that were meant to expand and contract as needed.
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Chapter 7: How did Feynman's philosophy on knowledge shape his teaching?
They were made from a synthetic rubber called vitin. It had been suggested to Feynman that the O-rings might fail under certain weather conditions.
Tina calls RPF after working on his car in D.C. winter cold and notes that O-rings are not very flexible in cold weather. Could that have been a factor since it was very cold on the day of the launch? RPF sounds like a good possibility.
The day of the launch had been cold, cold enough that some of the engineers were worried, but not cold enough for NASA to scrap the launch. They had already had to do that a couple times. Looking back, it appears that on this day, NASA leadership was in the grips of what is called go fever. So go they did. It was a bitter cold but sparkling clear morning at Cape Canaveral.
There was a sense of relief that the much delayed flight was finally underway.
Looks like a couple of the solid rocket boosters blew away from the side of the shuttle in an explosion.
We have a report from the flight dynamics officer that the vehicle has exploded. We are looking at checking with the recovery forces to see what can be done at this point.
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Chapter 8: What legacy did Richard Feynman leave behind in the scientific community?
Richard Feynman was a patriot. He loved NASA. He loved adventure and exploration. He even loved risk-taking, as long as the risk had been properly calculated. What he hated was any attempt to paper over the truth. As a scientist, all he wanted was to find out true things. Here are some other things he hated. Hypocrisy, BS, and the use of unscientific thinking to make important decisions.
And that's where he felt the Rogers Commission had landed. Ever since working on the atomic bomb at Los Alamos, Feynman had known that scientists and generals don't always mix well. So he now decided to pull a stunt. This was very much in character for Feynman. He had a brand of intelligence that could tip into the obnoxious. At Los Alamos, he became famous for cracking safes.
As a kid, he had discovered that the radio quiz show he listened to with his family played earlier on a different station, so he would listen to the early version in his bedroom and then magically know all the answers when they listened together downstairs. But this stunt on a presidential commission investigating a national tragedy would be in public, on television.
Let's get back to those notes in the archive.
Next morning, Feynman in suit and tie gets in a taxi. Take me to a hardware store. But we're in downtown Washington, sir. The Capitol is over there, the White House over there. There's no hardware store around here. But Driver remembers one a few miles away and takes RPF to it. They wait until it opens at 8.30. C-clamps seem to be too big, but RPF buys one anyway.
Also buys screwdriver and wrench to get model apart.
His idea was simple. He would dunk a model of the shuttle's O-ring assembly in a glass of ice water, let it get down to the temperature it had been when the Challenger was launched from Cape Canaveral, and then see how the O-rings responded. It was the kind of thing a good science teacher might show his students to demonstrate what is called thermal hysteresis.
In public hearing, no ice water. RPF asks for some, and there is a big delay. Page thought RPF wanted ice water for everyone. Several good opportunities are missed. Finally, ice water comes.
Commission member Richard Feynman, after examining the O-ring, had a surprise.
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