Category Archives: Biology

Truth is stranger than fiction.

Did you know that goats don’t have round pupils?

I’ve always assumed that all eyes were variations on the same design: round eyes with round pupils, like this picture.


Then yesterday, for the first time, I realised that goat pupils aren’t round.

They’re rectangular.

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Did you know that blood is poisonous to brain cells?

But that’s just weird.

Yes. Yes, it is.

If you look properly at the brain, you’d realise that there’s a barrier between the blood vessels and our actual brain cells. Nutrients can pass through the barrier, but not blood. If blood touches any brain cells, they die. That’s why strokes can be so dangerous.

Most strokes happen because a blood vessel (usually an artery) has been blocked and some parts of the brain can’t get any of the stuff they need, but some strokes happen because of a burst vessel. Something goes wrong, blood flows into the brain cells, brain cells die, a hole gets left behind, and certain problems arises.

Kinda weird how the very thing that you can’t live without is poison to your own brain, huh?


Did you know that plants grow more leaves in strong sunlight?

Because more leaves = more light trapped = more photosynthesis. For those who don’t know what photosynthesis is, think about it this way:

Humans eat: food goes into the mouth –> lots of fancy bio technobabble –> body gets nutrients, poop comes out

Plants synthesize: leaf absorbs sunlight and carbon dioxide gas –> lots of fancy bio technobabble –> plant gets glucose (nutrient), oxygen is released

Moving on.

Plants grow more leaves when there’s strong sunlight but the leaves have less nutrition than usual, because the plant’s growing so many leaves at once, so even though there are more leaves, bugs have to eat more leaves to get the same amount of nutrition, so the plants are probably left with the same number of leaves at the end of the day. Which is kinda sad. For both sides. Imagine eating so much yet not getting full.

Did you know that a snail’s anus is above its head?

For some reason, the urge to say this tends to appear when I’m eating with people. But I kid you not, an adult snail’s anus really is above its head.

At first, when the snail is young, its anus is at the other end of its body, like most animals, but as it grows older, its gut starts to twist, its body rotates so that the bottom end is above its head. Apparantly, its an evolutionary adaptation. With its anus with its mouth, the snail can hide┬ámost of its body in its shell for protection. The downside is that there’s a possibility that the snail will accidentally eat its own poop. But hey, a little poop’s a decent price for increased survival. Don’t you think?

Maybe not.

Isabel Caves

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Faristha Kanakkapillai

Skruulraken's Words

The blog of works by Connor R. Ryan.