Curiosity Weekly
Dirty Toothbrush, Smart Crows, Rare Supermassive Black Hole
Oct 26, 2023
The podcast discusses toothbrush contamination and hygiene, revealing that toothbrushes can become filled with millions of bacteria. It also explores the surprising discovery of a lower number of active supermassive black holes, as well as the intelligence of wild crows.
13:16
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Quick takeaways
- Toothbrushes can become contaminated with various bacteria and viruses, but our immune systems can usually handle it.
- Crows demonstrate statistical reasoning abilities, remembering images associated with higher probabilities of receiving a reward.
Deep dives
Your Toothbrush is a Hotbed of Bacteria
A new analysis reveals that toothbrushes become contaminated even after the first use, accumulating bacteria such as the flu virus, staph bacteria, E. coli, yeast fungus, and strep virus. However, our immune systems can handle this bacterial load and rarely get sick. To minimize germs, experts recommend rinsing toothbrushes thoroughly, washing hands before brushing, storing toothbrushes away from the toilet, and allowing them to dry out.
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