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## Why doesn’t copper affect human skin?

It’s been known for a long time that copper has antimicrobial properties, but if it is so potent, why does it seem to have no effect on human skin or really any large animal?

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## If the covid-19 appeared once, could it reappear anytime?

Governments are imposing confinement measures on their populations, trusting that if there is no more transmission the virus will die out. But since this coronavirus appeared a first time, what could prevent it from reappearing any number of times ?

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## Is Covid 19 more deadly than swine flu?

I have a question about the coronavirus and swine flu. How does the death rates compare between the 2 diseases? How do the transmissions and rate of transmutation compare? Was a vaccine developed by earlier on for swine flu? I ask because I remember when swine flu came before and I don’t remember this much […]

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## Can you explain the behavior of this snake?

I just saw this video in which a snake is swallowing a grape. (“Whip snake eating grapes”). In the video, the snake just doesn’t eat but goes on to swallow 2-3 grapes. I did some research on the internet and “bio stack exchange” but only to find that “snakes are obligate carnivores”, which simply means […]

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## Is it possible to freeze a culture of microbes?

I am sure you have seen these kind of images with a microbe culture from a hand print. I was wondering if it would be possible at all to grow them and then use some kind of material to “freeze” them (like petrifying them or something) without loosing the color or the texture. And if […]

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## How can we calculate the constants of the SIR model?

I am not a biologist by profession, but I am attempting to implement a simple SIR model from the following paper. The paper assumes the following constants are known: rc = growth rate of susceptible group S k = carrying capacity of susceptible group in absence of infection alpha = max value of per capita […]

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## How can we calculate the constants of the SIR model?

I am not a biologist by profession, but I am attempting to implement a simple SIR model from the following paper. The paper assumes the following constants are known: rc = growth rate of susceptible group S k = carrying capacity of susceptible group in absence of infection alpha = max value of per capita […]

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## How can we calculate the constants of the SIR model?

I am not a biologist by profession, but I am attempting to implement a simple SIR model from the following paper. The paper assumes the following constants are known: rc = growth rate of susceptible group S k = carrying capacity of susceptible group in absence of infection alpha = max value of per capita […]

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## How does the immune system find the DNA code for antibodies

There are millions of possible antigens. To respond to each antigen, the immune system must quickly produce an antibody by modifying the DNA of a B cell. I have no idea how this process works, but surely it can’t be by trial and error. So I thought how I would do it: The part of […]

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## How can I get started in molecular biology?

I have a background in computer science and math and am interested in learning molecular / synthetic biology – what resources do people recommend?