Dirty Toothbrush, Smart Crows, Rare Supermassive Black Hole
Curiosity Weekly
Warner Bros. Discovery
4.6 • 963 Ratings
🗓️ 26 October 2023
⏱️ 13 minutes
🧾️ Download transcript
Summary
Today, you’ll learn about how a tool we use to keep clean might need a little cleaning of its own, the wild intelligence of wild crows, and the case of the missing black holes.
Dirty Toothbrush
- “An updated systematic review on toothbrush contamination: An overlooked oral health concern among general population.” by Shahrukh Ali Khan, et al. 2023.
- “Can Your Toothbrush Make You Sick?” n.a. 2019.
- “Toothbrush Terror! Can Your Toothbrush Make You Sick?” by Stephanie Watson. N.d.
Smart Crows
- “For the first time, research reveals crows use statistical logic.” by Kenna Hughes-Castleberry. 2023.
- “Like humans, these big-brained birds may owe their smarts to long childhoods.” by Amanda Heidt. 2020.
- “Crows flexibly apply statistical inferences based on previous experience.” by Melissa Johnston, et al. 2023.
- “Crow Vocalizations Part II: Q&A.” Corvid Research. 2019.
- “Flying in for the Crow Funeral.” by Anne Marshall-Chalmers. 2020.
- “Canuck & I.” YouTube Video. 2021.
Rare Supermassive Black Hole
- “Active supermassive black holes may be rarer than previously thought.” by Darren Incorvaia. 2023.
- “James Webb Space Telescope reveals active supermassive black holes were surprisingly rare in early universe.” by Robert Lea. 2023.
- “Supermassive black holes: Theory, characteristics and formation.” by Andrew May. 2022.
- “James Webb Space Telescope Reveals Fewer Supermassive Black Holes Than Presumed.” The University of Kansas. 2023.
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Transcript
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| 0:00.0 | Hi, you're about to get smarter in just a few minutes with Curiosity Daily from Discovery. |
| 0:09.0 | Time flies when you're learning super cool stuff. |
| 0:10.8 | I'm Nate. |
| 0:11.8 | And I'm Kali. If you're dropping in for the first time |
| 0:13.6 | welcome to curiosity where we aim to blow your mind by helping you to grow your mind. |
| 0:17.6 | If you're a loyal listener, welcome back. Today you'll learn about how a tool we use to |
| 0:21.6 | keep clean might need a little cleaning of its own, the |
| 0:24.5 | wild intelligence of wild crows, and the case of the missing black holes. |
| 0:30.2 | Without further ado, let's satisfy some curiosity. |
| 0:33.0 | A new analysis of over a dozen studies has revealed an uncomfortable truth. |
| 0:38.0 | Your toothbrush is gross. |
| 0:40.0 | My toothbrush? Why were they analyzing my toothbrush in a dozen studies? |
| 0:45.0 | I mean it seems important eight people want to know. |
| 0:47.5 | Okay well. |
| 0:48.5 | Okay but no not just yours. |
| 0:50.5 | Potentially every used toothbrush out there is is chalk full of all kinds of bacteria. |
| 0:55.6 | By some counts, there could be millions of tiny bacteria on a single toothbrush, |
| 0:59.4 | including germs like the flu virus, staff bacteria, echol coli, yeast fungus, and even the strep virus. |
| 1:05.6 | Hmm, so I brush my teeth twice a day with that germ-infested nightmare stick. |
| 1:12.1 | How am I not sick all the time? |
| 1:15.0 | Well, to be blunt, our mouths aren't the cleanest places in the first place. |
| 1:21.0 | They are flush with microorganisms that our saliva and our immune |
... |
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