This is simply untrue. Rutherford, and the discovery of radon, revealed that.
From the Nobel Prize website:
Marie discovered that thorium gives off the same rays as uranium. Her continued systematic studies of the various chemical compounds gave the surprising result that the strength of the radiation did not depend on the compound that was being studied. It depended only on the amount of uranium or thorium. Chemical compounds of the same element generally have very different chemical and physical properties: one uranium compound is a dark powder, another is a transparent yellow crystal, but what was decisive for the radiation they gave off was only the amount of uranium they contained. Marie drew the conclusion that the ability to radiate did not depend on the arrangement of the atoms in a molecule, it must be linked to the interior of the atom itself. This discovery was absolutely revolutionary. From a conceptual point of view it is her most important contribution to the development of physics. She now went through the whole periodic system. Her findings were that only uranium and thorium gave off this radiation.
These experiments were conducted in 1897. Radon was discovered in 1900, and Rutherford's research on the transmutation of elements began in 1900 and he performed his gold leaf experiment in 1911. I will admit that I was wrong about Marie Curie being the first scientist to propose that atoms had an internal structure. JJ Thomson hypothesized that electrons were building blocks of atoms in 1897. But as far as I can tell, Marie Curie was the first scientist to realize that radiation is attributable to internal properties of atoms. If you have any evidence suggesting otherwise, please present it.
Is it not at least equally likely that the present is crazy, and the past was wise?
No, it is not. Knowledge is generally cumulative, although there are occasional setbacks.
Anyway, I just responded to correct your factual claim. I'm bowing out of this exchange now, because feeding trolls is bad.
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There is this strange relationship between politics, mindkilling, and education...
When a topic becomes political, people get mindkilled about it. Then they tell many stupid things. And the sane person, who wants to avoid discussing with idiots or even the risk of being pattern-matched as one of the idiots, avoids the topic. But if sane people avoid the topic, all information is replaced by noise. And if people are uneducated about the topic, but they still think parroting a phrase of their leader makes them smart, of course politicians will use the topic for their advantage.
You cannot use "2+2=4" as your party banner, if everyone agrees with that. And you also cannot use "2+2=5" as your party banner, if everyone disagrees with that. But you can use "evolution" or "free market", because people are divided about this topics, because many of them just lack the basic knowledge. Of course by using these topics as party banners, the education becomes more difficult; or more precisely it becomes trivially easy to label people as "parrotting their party line" even in those situations where they just honestly evaluate the evidence. Also, such environment makes honestly evaluating the evidence more difficult for humans.
Sometimes I feel like smart people avoiding the mindkilling topics indirectly contribute to the topics being mindkilling, by leaving the politicians of various kinds unopposed. Though of course I understand the motive to avoid toxic things. Also I understand that there are too many things fucked up with this world, and one has to pick their battles. But we really should educate people at least about the basic, easiest to understand stuff. Because many of them didn't hear even some trivial ideas; or they heard them once and then forgot.
Raising the sanity waterline while avoiding sensitive topics -- maybe it's like trying to clean your room without entering the room.
Let's just take each topic as far as we have solid evidence. Just like there is no "conservative" or "liberal" position on whether 2+2=4, we could try to see how far this neutral region of knowledge can go.
Evolution is true, in the sense that there is overwhelming evidence that men evolved from apes, and that likenesses between kinds is a literal family resemblance, the result of ancestral shared blood or sap. "Evolution" is untrue, in that use of the word "evolution" tends to be almost perfectly correlated with distaste for the implications of Darwinism, and complete disbelief in the implications of Darwinism for humans and human nature, tends to be a codeword for denial of Darwinism.
Darwinism, however, is true, for the same reasons as evolution is true, and, unlike "evolution", is not a codeword for a collection of pious politically correct beliefs. Hence Dawkins, despite his otherwise progressive beliefs, calls himself a Darwinist, not an evolutionist.
However any discussion of the difference between "evolution" and Darwinism would produce a mind killing response that makes the discussion of gender differences harmless by comparison.