Recent content by Hernik

Thanks. Close the thread please.

...mixing up gravitational field and space time distortion. They are the same, so one not giving rise to the other.. sorry. Apart from that, I am still wrong, I understand?

Thanks. Well. How to ask a question. I guess, what I am thinking, is along the lines of: I would presume, the apple's presence would enhance the gravitational field slightly between the apple and the earth. And I would further presume that to give rise to a slight spacetime distortion in the...

Sorry about the spelling, phrase, I meant.

Thank you for helping me fraze this better. Maybe this will do: If you pick two different points at the same distance to the earth: A and B, and in A, an apple is placed, in B, nothing, would there be a length contraction between the apple at A and Earth compared to B and Earth? (Assuming Earth...

Thanks for your answer. Unfortunately, I don't understand. Apple and earth are co-moving, so no difference there. I suppose.

Maybe it is better to ask: Will the apple see a length contraction in the direction of the earth, and will the earth see a length contraction in the direction of the apple (although probably rather small)?

Hello. Apologies, if this is already answered in other threads. Please redirect me, if that is the case. Imagine an apple hanging from a tree. Will there be length contraction between the apple and the earth in the frame of reference of the earth, as well as of the apple? All the best, Henrik

Hi Buzz. I totally agree. What I am trying to say is that evolution is going on even through no change might be apparent from generation to generation (say frogs or crocodiles). It is something that used to confuse me into thinking that evolution is something that happens when necessary. On the...

Hi there! Great questions. If you're interested in why humans became "intelligent" you might want to read this study which recently appeared in Nature. https://natureecoevocommunity.nature.com/users/92985-mauricio-gonzalez-forero/posts/33491-the-human-brain-from-ecology-and-seemingly-culture...

Yes! Still we breed then in the ZOO for entertainment and educational purposes. It is very interesting that so few plant species deliver so many calories to humanity. Thanks! I love that title.

Thanks. Well, I am not sure about a definition. Wikipedia's "Animals bred and held in captivity" is certainly not broad enough for me. That would exclude plants, fungus and bacteria. Domestication is maybe not the right word. What I have in mind is an estimate of the number of species humanity...

Hi! Does anyone of you know of an estimate of how many biological species humans have domesticated - I mean everything from silkworm to chicken, yeast, lactic acid bacteria, rye, corn, horse, fruit fly, shrimp, zebra fish and jellyfish - any organism that we bread or culture for a purpose...

I am not a specialist. But my son has Down syndrome. I understand it this way: First of all: Normal children develop very different levels of mental and physical ability. So in that respect, it is maybe not surprising that "children with down syndrome develop different levels of mental and...

But in this link, provided by Chronos in post 12 as a paper that debunks misconceptions on the expansion of space: http://arxiv.org/abs/astro-ph/0310808 the following sentences page 5 seem excactly to claim that expansion is simply distances changing and not a process initially involving motion...