things i learned

The size of Lake Victoria

2024-02-05

I was listening to Fall of Civilizations podcast and they referenced the size of Lake Victoria, the source of the Nile river, in Africa as approximately the US State of Georgia.

It turns out this is incorrect. Lake Victoria is 23,146 square miles while the US State of Georgia is 57,513 square miles. However, it is about the same size as the Country of Georgia, which is 26,830 square miles or the state of West Virginia (24,038 square miles). Still incredibly massive, and it's not even the biggest fresh water lake! That honor goes to Lake Superior, which is 49,300 square miles, about the size of Alabama or Greece and holds 10% of the world's fresh water (!).

In either case, Lake Victoria has shot up my list of places to go. I'm sure I knew that it was the source of the Nile river at some point, but there's something romantic about being reminded about all that distance and all that history.

Memory without the brain

2024-02-02

A compelling case that plants and animals without brains have memories.

“The neuron is not a miracle cell,” says Stefano Mancuso, a University of Florence botanist who has written several books on plant intelligence. “It's a normal cell that is able to produce an electric signal. In plants almost every cell is able to do that.”

On one plant, the touch-me-not, feathery leaves normally fold and wilt when touched (a defense mechanism against being eaten), but when a team of scientists at the University of Western Australia and the University of Firenze in Italy conditioned the plant by jostling it throughout the day without harming it, it quickly learned to ignore the stimulus. Most remarkably, when the scientists left the plant alone for a month and then retested it, it remembered the experience.

Found via The Browser.

The imagined history of Ellis Island

2024-01-26

Via Marginal Revolution:

The explanation for this is pretty obvious when you think about it. Just as today, people bought tickets and their names were written on the tickets.

I never get tired of the "you were taught this in school, but it probably didn't happen" type of thing.

Indirect driving deaths caused by 9/11

2024-01-22

Gaissmaier and Gigerenzer found that Americans flew less and drove more in the year after 9/11, which led to 1,600 more traffic deaths over that period than would otherwise have been expected.

From Range Widely by David Epstein

Disparity in divorce

2024-01-09

I saw this yesterday afternoon and it caught my eye:

It reminded me of #49 in my list of 52 things I learned in 2022: If a married woman is diagnosed with a brain tumor, there is a 21% chance that the couple will divorce; if the husband has a tumor, there is only a 3% chance they will divorce, which I found via Rob Henderson.

Based on some googling, I don't think this is the exact same study, but in the spirit of intellectual honesty, I figured I should post it.

There is some nuance, but the general relationship between illness and husbands divorcing their wives no longer holds.

Congratulations to I-Fen Lin and Susan Brown, who found the error, and Amelia Karraker who handled the correction with dignity.