50 Lesser-Known Facts That The “Today I Learned” Community Recently Shared

In 2019, Eimi Haga handed a blank piece of paper to her professor and hoped for the best. The first year student had been asked to write an essay about a visit to the Ninja Museum of Igaryu. She was studying ninja history. Something she became hooked on after watching an animated TV show as a child.

The night before her essay was due, the 19-year-old spent hours soaking soy beans, crushing them and squeezing them in a cloth. Haga then took another two hours to mix the soybean extract with the right amount of water. Only after she had finished all of this, did she quickly jot down her essay, without giving much thought to the content.

“I wasn't really worried about getting a bad score for my essay,” Haga later told the BBC. It might seem like the student was cooking instead of paying attention to her homework. But that couldn’t be further from the truth. She’d managed to pull off the ultimate student ninja move, using a technique known as "aburidashi".

The essay was written in invisible ink, and the words only appeared when the paper was heated. Before handing it to her professor, she left a note in normal ink telling him to heat the paper. "When the professor said in class that he would give a high mark for creativity, I decided that I would make my essay stand out from others," she said.

Her creativity paid off, earning her 100% without the professor even reading all of the essay. "I didn't hesitate to give the report full marks - even though I didn't read it to the very end because I thought I should leave some part of the paper unheated, in case the media would somehow find this and take a picture," said her professor, Yuji Yamada.

The student made world headlines with her magical essay, and put handwriting in the spotlight again. Her ninja move was so intriguing that she was featured on the "Today I Learned" subreddit.

If we were to ask you to grab a (normal) pen and notebook right now, would you be able to? Possibly not. In a world where technology reigns supreme, it might have been a while since you wrote anything by hand. But did you know that it’s actually one of the best ways to learn? Researchers say there are several benefits to closing your laptop or ipad and putting pen to paper.

Whether we write or type, we have to use our hands to get words to appear on a page. But because handwriting is more complex, it supports learning more. A study published earlier this year found that “the precisely controlled hand movements when using a pen contribute extensively to the brain’s connectivity patterns that promote learning.”

Psychologist and co-author of the study Audrey van der Meer explained that handwriting is worlds apart from typing. "We don't see that [synchronized activity] in typewriting at all." She added that writing by hand is a "neurobiologically richer process" and that this in itself has cognitive benefits.

Cognitive neuroscientist Marieke Longcamp agrees, saying that handwriting is one of the most complex motor skills our brains are capable of. While van der Meer adds that when you type something, you're not actually processing all the information the way you would when you write it down by hand.

You might think taking notes by hand in a meeting or class is tedious, and time-consuming. But that's exactly why it works. Van der Meer explains that because it takes longer, you're forced to process the information. You might write key words or phrases and use drawings or arrows to work through ideas. "You make the information your own," she told NPR, and that helps it stick in the brain.