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

How does Drano work?

🔥 + 🫧 = 🚰

Read More
Anatomy, Food & Drink, Chemistry Caitlin Olson 2/7/26 Anatomy, Food & Drink, Chemistry Caitlin Olson 2/7/26

Why does salt make food taste better?

Our least bland article yet

Read More
Physics, Chemistry Caitlin Olson 2/7/26 Physics, Chemistry Caitlin Olson 2/7/26

Why does glass break so easily?

I'll be transparent...

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
Technology, Chemistry, Biology Caitlin Olson 12/26/25 Technology, Chemistry, Biology Caitlin Olson 12/26/25

How is plastic being removed from the ocean?

It's pretty plast-uck (but we're working on it)

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
Chemistry, Physics Caitlin Olson 3/20/25 Chemistry, Physics Caitlin Olson 3/20/25

Why does plastic turn yellow?

We've cracked this polymer-der mystery

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
Chemistry, Biology, History, Physics Caitlin Olson 9/12/24 Chemistry, Biology, History, Physics Caitlin Olson 9/12/24

How does carbon dating work?

Swipe right for science.

Read More
Science, Life Skills, Chemistry Caitlin Olson 7/25/24 Science, Life Skills, Chemistry Caitlin Olson 7/25/24

Does soap need bubbles to clean?

I hate to burst your bubble…

Read More
Science, Chemistry, Technology Caitlin Olson 6/27/24 Science, Chemistry, Technology Caitlin Olson 6/27/24

How do fireworks work?

Our most explosive article yet

Read More
Science, Biology, Chemistry Caitlin Olson 4/18/24 Science, Biology, Chemistry Caitlin Olson 4/18/24

What do antioxidants do and why do we need antioxidants if we need oxygen to survive?

Take a deep breath and then dive into the biochemistry that keeps you trucking along.

Read More
Science, Chemistry, Food & Drink Caitlin Olson 4/18/24 Science, Chemistry, Food & Drink Caitlin Olson 4/18/24

What is vinegar and how does vinegar preserve food?

And what exactly is the “mother” of vinegar?

Read More
Science, Life Skills, Policy, Chemistry Caitlin Olson 4/17/24 Science, Life Skills, Policy, Chemistry Caitlin Olson 4/17/24

How are cosmetic expiration dates determined?

It turns out the U.S. has more of a “you do you” approach to consumer safety regulation.

Read More
Science, Food & Drink, Chemistry, Life Skills Caitlin Olson 4/11/24 Science, Food & Drink, Chemistry, Life Skills Caitlin Olson 4/11/24

Why does frying in oil make food crispy?

If you've ever wondered why your food tastes so good when it's cooked in oil, it's because of a little thing called heat transfer.

Read More
Science, Chemistry, Physics Caitlin Olson 4/11/24 Science, Chemistry, Physics Caitlin Olson 4/11/24

Why do candles smoke when blown out?

What if I told you the smoke is actually vaporized wax?

Read More
Science, Chemistry, Food & Drink Caitlin Olson 3/14/24 Science, Chemistry, Food & Drink Caitlin Olson 3/14/24

How is vegetable oil made?

It’s greasy work.

Read More
Life Skills, Science, Technology, Chemistry, Engineering Caitlin Olson 2/22/24 Life Skills, Science, Technology, Chemistry, Engineering Caitlin Olson 2/22/24

How do thermal printers work?

Heat + ink + paper = receipt

Read More
Science, Life Skills, Food & Drink, Chemistry Caitlin Olson 1/25/24 Science, Life Skills, Food & Drink, Chemistry Caitlin Olson 1/25/24

How is coffee decaffeinated?

There’s no such thing as a coffee bean without caffeine.

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