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Rich uses plain language to explore in-depth biology topics | fascinating plants and exotic creatures | www.biology4everyone.com | indulge your curiosity!


Photo by Nicolas Hoizey on Unsplash

The race to replace the cells in my body!

In what seems like a millennium ago, I think one of my biology teachers said something to the effect that every 7 years, all the cells in my body would be new ones because all the old ones would have died and been replaced.

I thought that was pretty neat! I mean, we know that some cells like the blood cells are replaced pretty rapidly. And some cells stay for a really long time, like bone cells and nerve cells.

And that kind of consoled me because many years ago, I was a smoker and I was pretty sure that…


A figure from this article showing clustering of the dietary intake into 25 patterns

4 simple things you can do to be healthier and prevent disease.

Every time I go into the kitchen looking for a quick snack, I always seem to come away with the same thing; some form of bread product.

It could be a slice of toast or crackers or a cookie but no matter what shape or form it takes, it’s bread!

Now in my defense, I make all my own bread so it’s pretty nutritious with a high whole wheat flour content and lots of good things in it like nuts and seeds and other good grains, but it’s still bread. Which is kinda limiting.

If you fall into similar habits…


Translating plant language to understand what they would tell us if they could

Photo by Tony Pham on Unsplash

When I or my partner walk around our yard we look at the plants and wonder things like, do they need to be watered? Are they getting enough fertilizer? Are the slugs bothering them?

There’s all sorts of magazines and online resources that will tell you to look for this or that. Or if you see the leaves turn this colour it means they need this nutrient or there’s too much of that one.

But what if the plants could just tell us what they want?

“Hey, I’m thirsty! Can you please water me now!”

A couple of years ago…


Pharmacy leech jar, England, 1830–1870. Credit: Science Museum, London. Attribution 4.0 International (CC BY 4.0)

Our past, present and future with these slimy creatures that love to suck out our blood

My partner and I went on a camping trip in BC’s Interior region this past summer. One of our overnight camps was on a small remote lake up in the mountains that just a few locals seemed to know about. A Mom and her young son were paddle-boarding it. When we asked them if it was ok to swim in they said “Yeah, but you have to pick the leeches off when you come out.”

Yuck! We DID NOT swim in it!

I don’t know about you but the thought of having leeches sticking to me and sucking my blood…

Rich Sobel

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