0
Skip to Content
Today You Should Know
👋 About
🫁 Anatomy
🌌 Astronomy
🦠 Biology
🧪 Chemistry
🎭 Culture
🔧 Engineering
🍟 Food & Drink
📜 History
✍️ Language
🧵 Life Skills
🧮 Math
🎹 Music
🧲 Physics
🧠 Psychology
🏛️ Public Policy
⚙️ Technology
🐋 Zoology
All Articles
Surprise Me!
🤔 Submit a Question
📚 Book Recommendations
🦄 Weird Wikipedia
Subscribe
Today You Should Know
👋 About
🫁 Anatomy
🌌 Astronomy
🦠 Biology
🧪 Chemistry
🎭 Culture
🔧 Engineering
🍟 Food & Drink
📜 History
✍️ Language
🧵 Life Skills
🧮 Math
🎹 Music
🧲 Physics
🧠 Psychology
🏛️ Public Policy
⚙️ Technology
🐋 Zoology
All Articles
Surprise Me!
🤔 Submit a Question
📚 Book Recommendations
🦄 Weird Wikipedia
Subscribe
👋 About
Folder: 📝 Articles
Back
🫁 Anatomy
🌌 Astronomy
🦠 Biology
🧪 Chemistry
🎭 Culture
🔧 Engineering
🍟 Food & Drink
📜 History
✍️ Language
🧵 Life Skills
🧮 Math
🎹 Music
🧲 Physics
🧠 Psychology
🏛️ Public Policy
⚙️ Technology
🐋 Zoology
All Articles
Surprise Me!
🤔 Submit a Question
📚 Book Recommendations
🦄 Weird Wikipedia
Subscribe
No results found
History, Engineering, Technology, Life Skills Caitlin Olson 10/16/26 History, Engineering, Technology, Life Skills Caitlin Olson 10/16/26

Why are blood pressure and tire pressure measured differently?

The history is quite mercurial.

Read More
Anatomy, Chemistry, Life Skills Caitlin Olson 8/6/26 Anatomy, Chemistry, Life Skills Caitlin Olson 8/6/26

How do pimple patches work?

(Z)it's fairly simple

Read More
Food & Drink, Biology, Life Skills Caitlin Olson 7/16/26 Food & Drink, Biology, Life Skills Caitlin Olson 7/16/26

Is the “five-second rule” legitimate?

Bacteria won't politely wait for you to pick your food up

Read More
Physics, Anatomy, Life Skills Caitlin Olson 3/5/26 Physics, Anatomy, Life Skills Caitlin Olson 3/5/26

What does "feels like" temperature mean?

"Feels like" this'll be a great article to read.

Read More
Life Skills, Chemistry Caitlin Olson 2/7/26 Life Skills, Chemistry Caitlin Olson 2/7/26

How does Drano work?

🔥 + 🫧 = 🚰

Read More
History, Life Skills Caitlin Olson 2/7/26 History, Life Skills Caitlin Olson 2/7/26

Why is there cotton in pill bottles?

And should you take it out after opening?

Read More
Science, Technology, Life Skills Caitlin Olson 2/7/26 Science, Technology, Life Skills Caitlin Olson 2/7/26

How should you charge your devices to maximize battery life?

Don’t overheat, try to keep it between 20-80%, and avoid knockoff chargers.

Read More
Anatomy, Life Skills Caitlin Olson 2/7/26 Anatomy, Life Skills Caitlin Olson 2/7/26

Why does oversleeping make you tired?

I yawned so much writing this

Read More
Chemistry, Life Skills Caitlin Olson 2/7/26 Chemistry, Life Skills Caitlin Olson 2/7/26

What does shaving cream do?

Let me shave you the trouble of researching this yourself

Read More
Anatomy, Life Skills Caitlin Olson 2/5/26 Anatomy, Life Skills Caitlin Olson 2/5/26

How does general anesthesia work?

Knock yourself out

Read More
Life Skills, Biology Caitlin Olson 12/4/25 Life Skills, Biology Caitlin Olson 12/4/25

Why do leaves kill grass but snow does not?

It’s time for Grass Class.

Read More
Policy, Technology, Life Skills Caitlin Olson 9/4/25 Policy, Technology, Life Skills Caitlin Olson 9/4/25

Where does trash go?

Nothing but trash talk in this one

Read More
History, Math, Astronomy, Life Skills Caitlin Olson 8/14/25 History, Math, Astronomy, Life Skills Caitlin Olson 8/14/25

Why do we have leap years?

Take a leap of faith that this article will be worth your time

Read More
Food & Drink, Life Skills, Chemistry, Physics Caitlin Olson 7/17/25 Food & Drink, Life Skills, Chemistry, Physics Caitlin Olson 7/17/25

Can you cook pasta without boiling water?

I can also confirm that a watched pot does indeed boil

Read More
Life Skills Caitlin Olson 5/15/25 Life Skills Caitlin Olson 5/15/25

Do you need to wash dishes with hot water?

Hot takes incoming…

Read More
Chemistry, Life Skills Caitlin Olson 1/23/25 Chemistry, Life Skills Caitlin Olson 1/23/25

How does superglue work?

It’s super cool.

Read More
Anatomy, Life Skills Caitlin Olson 9/15/24 Anatomy, Life Skills Caitlin Olson 9/15/24

Why do my joints creak after yoga?

Is it something to worry about?

Read More
History, Policy, Life Skills Caitlin Olson 9/14/24 History, Policy, Life Skills Caitlin Olson 9/14/24

Why is dental insurance separate from medical insurance?

Your teeth are a part of your body, right?

Read More
Science, Life Skills, Physics Caitlin Olson 9/13/24 Science, Life Skills, Physics Caitlin Olson 9/13/24

Why is it easier to balance a bike in motion?

It’s easier to ride a bike than to understand why it’s easy to ride a bike.

Read More
Life Skills, Policy, Technology Caitlin Olson 9/13/24 Life Skills, Policy, Technology Caitlin Olson 9/13/24

Do elevator “Close Door” buttons really work?

It depends. If you're in the United States, probably not. If you're outside the U.S., probably so.

Read More
Older Posts
GIF of Past Newsletter Articles

Curious about how the world works?

Today You Should Know is a free weekly email newsletter designed to help you learn something new every Friday in 5 minutes or less.

Subscribe today 👇

Today You Should Know is a labor of love by Caitlin.

Learn five facts about Caitlin.

Caitlin

Recent Articles

About

Book Recommendations

Privacy Policy