Rowan Jacobsen
speaker
1,919 appearances
4 recordings
4 series
first heard Jul 2022
last heard 26 Jun
Rowan Jacobsen’s voice in public audio — every appearance, attributed to the second.
Trend
recordings per month · last 12 monthsRecordings per month over the last 12 months — 3 in all, peaking in Jun 2026 with 3.
Appearances
Really bad disease.
And in the Industrial Revolution, kids started getting rickets.
Farm kids never got rickets.
Then suddenly kids are working in factories.
They're living in cities that are choked with coal smog.
They're living in tenement buildings.
They're never seeing the sun, and they all start getting rickets, late 1800s.
Vitamin D. It was all vitamin D. At first, they thought maybe it was vitamin A. But it turned out that was how vitamin D was discovered, was some doctors figured out that it could solve rickets in kids.
And then they figured out that if sun hit skin, that's how we made vitamin D.
Then they figured out... How did they figure that out?
They tested... They did some tests on dogs.
Actually, one of the guys figured it out.
He had a hunch that that's what it was.
They noticed that kids in the country wouldn't get rickets and kids in the city did get rickets.
So they're like, I wonder if it's sunlight.
So then a guy took dogs and this was, I think, Scotland...
stuck them in a... They actually thought it was dietary.
He stuck them inside in this little warehouse and fed them oatmeal, which is what everyone in Scotland ate at the time.
And the dogs got rickets.
And he thought it was the oatmeal.
Showing 481–500 of 1,919 · page 25 of 96
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