Dorsa Amir Profile picture
Feb 1, 2022 8 tweets 3 min read Read on X
When imagining the past, people tend to forget that a huge portion of the population was made up of children — playing, learning, getting into mischief, & sometimes even making art. Here are a few lovely & lively examples of children's art from the historical record 🧵 1/
First up are these (newly discovered!) tiny handprints, found in Tibet & dated to around 200,000 years ago. They seem to be intentionally made by at least two kids — probably between 7-12 years old — who found a layer of soft travertine & decided to leave their marks 🤚 2/
In the 1st century AD, a Roman child used a stylus to carve this little stick figure into a wall in Pompeii. More than half of children's graffiti in Pompeii can be found in public, suggesting kids had active lives outside of home & lots of access to public spaces. 3/
From around 1200 AD, we have these stunning birch manuscripts from a little boy named Onfim who lived in Novgorod (present day Russia). In addition to homework exercises — like practicing the Cyrillic alphabet — Onfim also drew illustrations of knights, horses, & battles. 4/
Also from the Middle Ages, we have these snippets of a Jewish child's writing exercises, from the Cairo Geniza collection. In addition to practicing the Hebrew alphabet, we can also see a little doodle of what appears to be a camel, and perhaps a tiny little menorah. 5/
A close examination of Charles Darwin's original draft of Origin of Species reveals that manuscript paper was often recycled in the Darwin home as scratch paper for drawing. Darwin's children's doodles can be found all along the margins & backsides of the manuscript. 6/
Of course, children also experienced major events in the world — such as World War I — alongside adults, and often incorporated these events into their drawings. Here's a French child's drawing from 1907, showing American troops marching victoriously into Paris. 7/
Overall, hopefully a reminder that despite often being overlooked, children have always been a part of our communities, and have sometimes found ways to leave their marks on history. 8/8

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More from @DorsaAmir

Jun 15, 2023
A few million years ago, our ancestors started walking upright. Big mistake! (Only slightly kidding). Bipedalism helped us a lot: it freed up our hands to use tools & engage in cool new behaviors. But it also came with a lot of costs, many of which we're still paying today (1/7) Image
First up: pain! My god, the pain. Usually in the back, knees, & ankles. These are some of the most common health issues & bipedalism is largely to blame. Walking upright places extra stress on our poor bodies, which are constantly aching under the strain & weight. (2/7) Image
Humans are also a massive fall risk. Bipedalism changed our center of gravity & point of contact with the ground, making it more likely that we'll topple over. This becomes way more dangerous in pregnancy. Look how much our spines have to arch to support the extra weight. (3/7) Image
Read 7 tweets
Jan 16, 2023
I'm a developmental scientist who studies how children grow & learn across cultures. I'm also an American mom who feels the extreme pressure put on parents in the West. I'm here to offer you some parenting ANTI-advice — here are a few things you can worry less about: 1/🧵
First: not everything has to be "educational". It's truly completely okay (& indeed, good) for kids to play for the sake of play. They don't have to be learning the alphabet or animal noises. They can just do whatever silly thing they want to do. They are ALWAYS learning! 2/
Second: you don't have to put pressure on yourself to constantly teach them things. In fact, active & direct instruction from an adult is the rarest form of teaching in human history. Kids know how to learn in other ways — like observation — & they're extremely good at it. 3/
Read 16 tweets
Sep 23, 2022
Protests continue in Iran today after #MahsaAmini's death in custody at the hands of the 'morality police' for violating the mandatory hijab laws.

How did we get here? The story is my family's story, and mine, too.

A personal history of women's oppression in Iran. 1/
Some background. It's 1952. Mosaddegh is the democratically-elected leader of Iran. Iran's oil is largely controlled by foreign interests. Mosaddegh fights back & dares to nationalize the Iranian oil industry. The West is angry; they organize a coup. 2/ npr.org/2019/01/31/690…
The coup succeeds in 1953. Great Britain & the US bring back the Iranian monarchy, putting Mohammad Reza Pahlavi in power. He quickly reverses course and gives split ownership of Iranian oil to Western companies. Just what they wanted. 3/
Read 18 tweets
Apr 15, 2022
Slides are visual aids that assist your presentation. Anytime you put something on your slides, its primary purpose is to help the *audience*, not you.

Nothing should distract from your verbal presentation, it should only enhance it.

A mini-presentation on slide design. 1/ Image
One common mistake is to clutter the slide with lots of text, which the speaker reads out to the audience, verbatim. This is a bit boring and inefficient. Condense down the text to the main question or point of the slide, and speak the rest. Scary, maybe, but you can do it! 2/
Refrain from using too many colors, texts, or animations. Again, these are more likely to distract the audience than they are to help them. Strip down slides to the key points, and make those clear. Do use animations to make items appear at the right moments. 3/
Read 11 tweets
Mar 26, 2022
I didn't want to dignify this with a response but this thread is toxic — filled with inaccuracies, stereotypes, & the dumbest takes possible. I think almost every single point is wrong, actually, & extremely harmful.

Anthony, if you had any sense, you would delete this. 1/
First of all, the trope that hunter-gatherers are "wild humans" is flawed, harmful, & condescending, and the idea that they have "full genetic expression" is literally so stupid I don't even know where to start. They're.. expressing more genes than us? 2/
That actually sounds to me like "we only use 10% of our brains". It's just nonsense. Genes are differentially expressed all the time, everywhere, and are constantly responding to input from the environment. This belies a massive misunderstanding of genetics. 3/
Read 15 tweets
Dec 18, 2021
Ever wonder how monkeys ended up in the Americas? Did they cross over land bridges like we did?

The answer is no. They did something even wilder: they floated across the Atlantic (!) millions of years ago. Yes, really.

Let’s talk about oceanic dispersal! (1/5)
So, how did the monkeys pull this off? Well, what happened is called a "rafting event": a piece of earth breaks off, with its flora & fauna intact, & essentially turns into a small floating island. In the Oligocene, the continents were closer, so the journey was shorter. (2/5)
As unlikely as it seems, according to genetic evidence, this type of event happened several times! Monkeys seem to have also rafted to the Caribbean (~11-15MYA), & the lemurs of Madagascar floated across the Mozambique Channel (~50-60MYA), among other rafting events. (3/5)
Read 5 tweets

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