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13

See also this letter by the Lubavitcher Rebbe on this subject, in which he states: It is my firm belief that the sun revolves around the earth, as I have also declared publicly on various occasions and in discussion with professors specializing in this field of science. He also explains why he believed this way based on the Theory of Relativity.


9

First of all, the whole point of the 'river turning to blood' was that it was supposed to be a miracle, an event showing that superiority of a force over the natural world (i.e. science). So, if anything, your example proves that the Jews DO believe in modern science, as they believe that there's no natural way to turn water into blood without divine ...


8

The Rambam himself addresses your question. He writes the following in Moreh Nevuchim regarding the science in the Gemara: Moreh Nevuchim (3:14): אל תדרוש ממני להתאים את כל ענייני האסטרונומיה שהם ציינו אל המצב כפי שהוא, כי המתמטיקה היתה לקויה באותם זמנים. והם לא דנו בזאת מבחינת שהם מוסרים אמרות אלה מפי הנביאים, אלא מבחינת שהם היו חכמי אותן תקופות ...


7

זוהר ויקרא דף י עמוד א כל העולם מתגלגל בעיגול ככדור אלו למעלה, ואלו למטה,וכל אלו הבריות משונות במראיהן משינוי האויר, כפי כל מקום ומקום, וקיימים במקומם כשאר בני האדם, ועל זה יש מקום בעולם כאשר מאור לאלו, חשוך לאלו, לאלו יום, ולאלו לילה, ויש מקום שכולו יום ולא נמצא בו לילה, חוץ משעה אחת קטנה Rough translation: The whole world revolves in a circle like a ...


7

Dr. Jeremy Brown, in a post on his Talmudology blog on science in the Daf Yomi, points out that Rava, quoted in Yevamot 97a, provides the first published claim that boys' puberty can be delayed by their being either overweight or underweight. כי אתו לקמיה דרבא אי כחוש אמר להו זילו אבריוהו ואי בריא אמר להו זילו אכחשוהו דהני סימנין זמנין דנתרי מחמת ...


7

Technically, "modern science" incorporates quantum mechanics, which includes the ideas of particles "blipping" in and out of existence, as well as that of all that science predicts are probabilities not definitive absolutes. So modern science doesn't really contradict the miraculous (which are essentially then statistical anomalies). Furthermore, at a ...


6

Apparently Rambam said: בבוקר אכול כמלך, בצהריים כבן מלך ובערב כאביון eat breakfast like a king, lunch like the son of a king and dinner like a pauper. among his other advice for health which seems to have stood the test of time. I read about this study last year which seems to confirm the wisdom of the above advice: High caloric intake at ...


6

Iyov (27:18) discusses the ephemeral nature of a wicked person's success: בָּנָה כָעָשׁ בֵּיתוֹ וּכְסֻכָּה עָשָׂה נֹצֵר Translation (Mechon-Mamre): He buildeth his house as a moth,1 and as a booth which the keeper maketh. The Malbim (Iyov, ibid.) interprets the verse as referring to the ephemeral nature of a Lepidoptera chrysalis: כמו שהעש ...


6

I would say that this is a question of the definition of testimony. We have the halachos in a number of places, including the talmud and Rambam hilchos Yibum, hilchos gittin, and hilchos nashim, about the circumstances as to who is believed if they come before bais din and testify that a person is dead. The implication of all of these is that the witness is ...


6

As Rabbi Yaacov Dovid Lach explains in his book Chullin Illuminated they are a fibrous adhesion that connect parts of the lungs to each other or to the surrounding walls of the chest cavity. In healthy lungs they are not present and thus indicate a problem. The exact nature of this problem is a matter of dispute (it either is caused by a previously present ...


6

If a five-time Oscar winner makes stupid comments about current political events he knows nothing about, does that mean we shouldn't trust his advice about acting? Of course we should: his acting has been tried and found true. Similarly (though l'havdil), any authority the Jewish community as a whole has examined over the years and accepted is a "winner".


5

Granting that time travel would ever be conceivable, I would make the following comments: Initially a reason should be provided to suggest that something is assur. Coincidentally however, I have thought of a comparable precedent which demonstrates how it is permissible to travel through time. Whenever we move, we inevitably alter time imperceptibly ...


5

It seems that Rambam anticipated certain aspects of Einstien's General Relativity. The traditional view was that time is absolute and constant: "Absolute, true, and mathematical time, of itself, and from its own nature, flows equably without relation to anything external." Issac Newton However, in the Guide to the Perplexed, Rambam sees time ...


5

If we're counting mathematical comments by rishonim (Medieval Scholars), then in addition to @DoubleAA's reference to Ralbag (Gersonidies) who has the earliest known use of mathematical induction, other Jews have made some strides here as well. R. Avraham bar Chiyya has an interesting proof that the area of a circle is equal to half its radius times ...


4

The Baal HaTanya writes: והיינו הגוף שלהם גדול כ"כ שהוא בבחי' מקום ומאחר שהם בבחי' מקום הרי הם ג"כ בבחי' זמן שהמקום והזמן שניהם הם נבראים בבחי' א So in other words, time cannot exist without space, and space cannot exist without time, they are one type of creation. Although I'm not sure the exact date of this Maamar, given the style it would seem to ...


4

This question was the root of an argument between Dr. Schroeder and Rabbi Slifkin. Dr. Schroeder insists (in his book Genesis and the Big Bang, and in many public lectures) that the order of creation in the Torah is meant to be taken chronologically and is correct. He explained the flying creatures which existed before the land animals to be referring to ...


4

According to the source in this answer to that question, Rabbi Menachem Genack of the OU had been quoted as saying The tissue samples would have to come from an animal that had been slaughtered according to kosher rules


3

Far from being a "simple" question, this is actually very complicated, and I'm in no position to answer it properly. I can tell you, however, that the doctrine to which you refer is kabbalistic. There are allusions to it in the Ramban's (Nachmanides') commentary on Genesis 1:1 and in the writings of other mediaeval scholars. Its fullest treatment is in the ...


3

Here's another "grain of salt" answer. If you accept the Vilna Gaon's drasha on Melachim Aleph 7:23, then Shlomo HaMelech knew pi to be 333/106=3.14151, a value not surpassed in accuracy by the scientific community for more than 1000 years, with Ptolemy's publication of 3.1416 in c150 CE.


3

From your assessment about the impracticality of observing and experimenting it seems your understanding of ruach meyzuyah is a wind that under normal circumstances can and might eventually blow, I would suggest that this is not the case. Rather, Ruach metzuyah means a wind that does blow. Practically constantly. First of all is the Mechaber in hilchos ...


3

On the whole, even the wicked people (or idolators) of the Bible do believe in some form of theism, even if not monotheism or the God of Israel, יקוה. To quote the Encyclopedia of the Bible and Its Reception on "Atheism": The theoretical objection to the idea of the existence of god(s) is beyond the intellectual world of ANE [Ancient Near East] and HB/OT ...


3

The Maharal in Be'er Hagolah discusses various "medical" or "scientific" parts of the Gemara (especially be'er 6 and 7). He explains that despite the fact that they don't seem to correspond to anything that would be helpful nowadays, there are metaphors and hints to important theological ideas behind what appears to be medical advice. Thus, these parts of ...


2

The Malbim has a novel perush on Bereishit (8:22) that help may to understand longevity: עֹד, כָּל-יְמֵי הָאָרֶץ: זֶרַע וְקָצִיר וְקֹר וָחֹם וְקַיִץ וָחֹרֶף, וְיוֹם וָלַיְלָה--לֹא יִשְׁבֹּתוּ. In explaining the (now) presence of the seasons he says that before the flood the Earth was not tilted. It was only after the flood that the Earth became tilted ...


2

An excerpt from Alei Shur (Shaar Rishon Ch. 12 p. 56): והנה בערך בזמנו של רבנו הקדוש היה חי באלכסנדריא האסארונום הגדול פטולימייוס מחבר ספר האלמגסט שמתוכו למדו אסטרונומיא עד הזמן החדש. כאשר נודע לפטולימייוס זה על מחזור הי"ט שנה והידיעות הברורות בחשבון סיבוב הלבנה וכו' עליהן הוא מתבסס - השתומם מאד, כיצד היתה בידי חכמי ישראל ידיעה שחכמי האומות טרם עמדו ...


2

Chazal understand HaShem's name Shakai to mean "She-amer dai" - that the universe expanded until HaShem said enough. (http://www.jewfaq.org/name.htm) According to prevailing scientific theory, there was an inflationary epoch, wherein the universe expanded much faster than the speed of light until "between 10−33 and 10−32 seconds after the Big Bang", when it ...


2

According to Quantum Physics' Heisenberg's Uncertainty Principle, often simplified as "To observe is to disturb," no such machine is even theoretically possible. Observing the behavior of any system affects the system being observed. Thus, the real brain and the "virtual" brain can't be identical. Furthermore, even if the brain were to be emulated, since ...


2

It occured to me while reading the Gen 1, that reptiles may be implied by the verses. First check out this answer. The exegetical approach used therein is the one I am attempting to use. Next, note the wording of verse 20, when water life and flying things are introduced: וַיֹּאמֶר אֱלֹהִים--יִשְׁרְצוּ הַמַּיִם, שֶׁרֶץ נֶפֶשׁ חַיָּה; וְעוֹף יְעוֹפֵף ...


2

There are a number of opinions regarding the observance of Shabbos in the Arctic circle where the sun may not rise/set for 6 months. Each opinion may have ramifications for space travel where there is neither sunrise nor sunset, as well as the issue you raise based on the relativity of time. There does not seem to be a halachik consensus on these matters. ...


2

Tol'dos Yitzchak (by Rav Yitzchak Karo, uncle of the Bes Yosef) suggests that the water and continents were combined at first as a muddy slush, and this command separated them, with the land portion coming together (and rising) to form the continents and the water portion coming together (and sinking) into the space between the continents. In his words: ...


2

Believe it or not, the gemara discusses cases where an individual can have 2 polar opposite statuses at the same time (for example see here). There are a number of cases brought in the gemara (Gittin 41b, Mishna Pesachim 8:1, etc.) of a person that is 'half slave, half free'. Of course, if you are a slave then by definition you are not free and vice versa. ...



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