If your wave your hand around and water does it not make waves in the water?

That's just an analogy, but why is the same concept so hard to believe when it's magnets in the EM field?

(It's just an analogy. Don't try to think of the EM field as little "molecules" of light that you are making waves in. It's a field and the photon is the discrete unit ("quantum") of energy in that field.)

Has it become more apparent that urban wildlife is becoming more adaptive and evolving to better suit an ever-changing landscape?

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A photon is the quantised amount of energy transferred between an electron and a the electromagnetic field when it moves between shells. Electromagnetic radiation always travels as waves, it is the transfer of energy between the field and atoms that is quantised. The concept of a photon being a light particle is incorrect.

One of the big reasons why allogenic bone marrow transplant works. The recipient gets chemo and radiation to kill off all of their own stem cells, which are mostly cancerous by this time. Not all die off and some may survive to cause a relapse of the leukemia.

Even in a 10/10 mhc match, the donor cells can't be perfectly matched to everything, so some graft vs host action is thought to be the Final element in battling whatever cancer cells may remain. To check for residual leukemia cells, they often look at the bone marrow for chimera - % of graft vs pretransplant stem cells....

Hope that answers your question

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Oh, boy do they have a separate vaginal opening.

There is variation, but the basic plan is that the male has a bifurcated penis. The female has two lateral vaginas, each leading to it's own uterus. In addition, there's a median vagina that opens into near the pouch (marsupium, which gives them their name) and that the babies must crawl from that opening to the pouch immediately* after birth, when they are just feet and lips*.

I rate the Wikipedia article on marsupials essentially accurate. Not worth the time and effort to clean up.

* Eh, close enough.

Edit: eliminated some false facts.

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There's evidence that a gene responsible for placental development in humans came from an ancient virus!

Syncytin-1, a protein coded by the ERV1 gene which is crucial for placental development. Syncytin-1 is a human endogenous retroviral element, viral genetic material that has incorportated into our genome. It is conserved among apes and old-world monkeys.

Syncytin-2, another placental development gene, is derived from a different retrovirus.

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Yeah it’s difficult or impossible to have an intuitive sense of this. This might help though:

Electricity and magnetism are fundamentally linked to each other. They are not exactly the same but they work in similar ways.

A radio antenna works by accelerating the electrons in the metal back and forth. You could theoretically make a radio signal by doing the same with a magnet, but it would be much, much harder since you would have to move the whole mass of the magnet back and forth, not just some of the electrons.

Oh wow interesting Thank You for the info, it’s just I was really curious since I went from a city to a town basically and those little cut board cutouts are plastered everywhere and even the FB app (since it picks up on my location) has been popping up posts for the trail for the new injection and that’s never ever happened, Thank You

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Timeline of the history of elements

Only 15 elements were know before modern times. It's a short list.

Ancient times there were a whole lot of competing theories about what makes up stuff. Classical elements of fire, earth, wind, water + other, were slightly more complicated that just those words. Atomism was the idea that everything could be divided smaller and smaller into discrete but unknown particles; versus substance theory that things when divided were just smaller versions of themselves.

That was just enough philosophy to explain metals. You can take some "earth" and divide it (by smelting, etc) until you get to an undivisible particle. That's how we get gold, copper, iron, tin, etc. It was really obvious that a person could manipulate something to get a pure form of something without needing to invoke ghosts or the void or phlogisten.

The general idea is something is an elementary particle until proven otherwise. Lots of missteps and bad guesses along the way.

There was a really weird short lived theory called tria prima that every substance was composed of three elements: a combustible element, a fluid and changeable element, and a solid, permanent element. That was a weird side tangent for explaining how smelting could make a pure element, by burning off the combustible and mixing with the correct flux to remove the fluid. But we still have the idea that there are unique particles of matter.

It was ~1730 that scientists started to get serious about observing the world. Antoine Laviosier proposed the new term of element to describe the basic undivisible particles we know and love today.

The killer discovery for finding elements was electrochemistry. It allowed someone to very carefully divide elements from each other, so long as you could dissolve the material and separate/capture what come off it.

My favourite is aluminium. It was predicted in 1756 because someone could see it was an oxide of something, but it wasn't isolated until 1824. In this example, a person found a new "earth" very early on, any every new it had to be smelted to isolate the atom inside. It just took a really really really long time to figure out how to dissolve it, such that electrolysis could remove the oxide or "earth" bits.

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Thank you so much!

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Okay but fundamentally speaking, if I say rotate a magnet continually, it actually emits radio waves? That is… weird. I am tempted to ask why, but I know the answer is, because the math says it has to. But this makes no intuitive sense. At all.

So if I take a magnet, and I flip it into a charged black hole, it’s going to emit radio waves all the way until it gets to the event horizon? I don’t understand this at all.

Light is a collection of photons. Photons are the carrier particle of electromagnetism.
Another way of thinking of carrier particles is thst they are excitations of a pre-existing field. So photons (light) are an excitation of the electromagnetic field.

This is why such a big deal was made of the discovery of the Higgs boson, as it provided evidence for the Higgs field.

To your other question, any moving magnet does perturb the electromagnetic field and creates electricity in an electrical conductor; this is essentially known as Faraday's law.

So, the evolution of the placenta is actually a really fascinating topic. Basically, the placenta is an organ that develops in female mammals during pregnancy and allows for the exchange of nutrients, gases, and waste between the mother and the developing fetus.

The thing is, not all mammals have placentas. In fact, the evolution of the placenta is thought to be one of the key factors that allowed mammals to become as diverse and successful as they are today.

So how did it happen? Well, scientists believe that the earliest mammals were probably small, shrew-like creatures that laid eggs. Over time, some of these mammals evolved to give birth to live young, which provided certain advantages in terms of protecting the developing fetus and increasing its chances of survival.

Eventually, these live-birthing mammals began to develop specialized tissues and organs that allowed for more efficient exchange of nutrients and waste between the mother and fetus. These tissues eventually evolved into the placenta we see in modern-day mammals.

It's a really cool example of how evolution can lead to some pretty complex and amazing adaptations.

An accelerating magnet does, just not at a wavelength that you can see. Keep in mind that the electromagnetic spectrum (light) includes radio waves, microwaves, infrared, visible light, UV, X-rays, and gamma rays. If you wave a magnet around, the emissions are going to be at the sub-radio end of the spectrum.