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2
votes
2answers
143 views

How was kashrut affected by Science?

I have been reading a lot of questions concerning kosher foods, to get a better understanding of what it means for something to be kosher. To an atheist, this site is very helpful. But as a chemistry ...
14
votes
1answer
295 views

Mushrooms in a Vineyard

The bracha on a mushroom is "shehakol" because the Talmud (Berachot 40b) correctly (I think) states that mushrooms do not derive their nutrients from the ground. If a mushroom is growing in a ...
8
votes
1answer
151 views

Would a genetically engineered red heifer be usable?

Assuming that a non-Jew chose to create a genetically engineered parah adumah (red heifer) and further assuming it met all the halachic requirements --no two black hairs, hadn't been used for work ...
-2
votes
1answer
104 views

Historical ID lost can it be reclaimed

Could it be possible that many Hispanics who moved from Spain and having their family line coming from Jewish blood (Sephardi Jews), be actually Jews and not know it? There is a test now to check ...
3
votes
0answers
113 views

What is meant by the 974 “worlds” that were “created and destroyed”?

Midrash Tehillim 90:13 says that God created and destroyed 974 worlds before this one. What exactly does that mean? I've heard it used in defense of a modern understanding of evolution and cosmology ...
3
votes
0answers
111 views

Would time travel be assur/mutar?

Inspired by this question which the author states is not a question of issur/heter. Assuming time travel is possible (to the future or past) is there any reason it should be assur?
3
votes
0answers
56 views

אלקים בגימטריא הטבע and not טבע?

There's a oft quoted saying that "אלקים בגימטריא הטבע." Why is it הטבע and not טבע? Isn't it "cheating" to add the extra "ה"?
2
votes
0answers
16 views

What type of mitzvah, if any, is a donation to medical research?

If I give money to a charity that finances medical research, I think I'm doing a mitzvah, but of what sort? Is this tzedakah when I'm not clothing or feeding the poor? Is it saving a life when there ...
2
votes
0answers
103 views

Mission to Mars: halachic challenges

There is talk in the scientific community of a manned Mars mission: sending an elderly couple to slingshot past Mars and return to Earth as a trial mission, toward eventual other missions that will ...
1
vote
0answers
59 views

How do we define the word 'עולם'?

In the standard beracha 'formula' we use the phrase 'מלך העולם'. But what does the word עולם refer to in this context: Earth/world or universe? It may seem obvious that מלך העולם is referring to ...