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
Why do we get muscle cramps after heavy exercise?
Science, Anatomy Caitlin Olson 8/1/24 Science, Anatomy Caitlin Olson 8/1/24

Why do we get muscle cramps after heavy exercise?

And why, of all things, pickle juice can help.

Read More
Does soap need bubbles to clean?
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
Why is the ocean blue if water is clear?
Science, Physics Caitlin Olson 7/18/24 Science, Physics Caitlin Olson 7/18/24

Why is the ocean blue if water is clear?

I promise this isn't the start to a riddle

Read More
Why are mosquitoes so loud?
Science, Biology, Zoology Caitlin Olson 7/11/24 Science, Biology, Zoology Caitlin Olson 7/11/24

Why are mosquitoes so loud?

A song (almost) no one wants to hear.

Read More
Why is the first pancake always bad?
Science, Food & Drink, Life Skills Caitlin Olson 7/4/24 Science, Food & Drink, Life Skills Caitlin Olson 7/4/24

Why is the first pancake always bad?

Don’t settle for a flop(jack).

Read More
How do fireworks work?
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
What causes the Earth to spin?
Science, Astronomy, Physics Caitlin Olson 6/20/24 Science, Astronomy, Physics Caitlin Olson 6/20/24

What causes the Earth to spin?

The original spin move.

Read More
Why do birds chirp in the morning?
Science, Zoology Caitlin Olson 6/13/24 Science, Zoology Caitlin Olson 6/13/24

Why do birds chirp in the morning?

The early bird gets the … solo?

Read More
How does popcorn pop?
Science, Food & Drink Caitlin Olson 6/6/24 Science, Food & Drink Caitlin Olson 6/6/24

How does popcorn pop?

And why do we eat it at the movies?

Read More
Why is 1 not a prime number?
Math Caitlin Olson 5/30/24 Math Caitlin Olson 5/30/24

Why is 1 not a prime number?

Fun fact: One wasn't even considered to be a *number* for a long time.

Read More
Is peanut butter a liquid?
Science, Food & Drink Caitlin Olson 5/23/24 Science, Food & Drink Caitlin Olson 5/23/24

Is peanut butter a liquid?

This might seem nuts, but…

Read More
Why is tennis scoring so weird?
History, Culture, Language Caitlin Olson 5/16/24 History, Culture, Language Caitlin Olson 5/16/24

Why is tennis scoring so weird?

You’re gonna “love” this one!

Read More
How do plants with purple leaves photosynthesize?
Science, Biology Caitlin Olson 5/9/24 Science, Biology Caitlin Olson 5/9/24

How do plants with purple leaves photosynthesize?

Also, why are most plants green anyway?

Read More
Why do we say "brand" new?
Language, History Caitlin Olson 4/25/24 Language, History Caitlin Olson 4/25/24

Why do we say "brand" new?

And, for that matter, why do we say brand “spanking” new?

Read More
Why do stars twinkle? And do stars actually twinkle?
Science, Astronomy Caitlin Olson 4/18/24 Science, Astronomy Caitlin Olson 4/18/24

Why do stars twinkle? And do stars actually twinkle?

Get ready for some scintillating knowledge!

Read More
What do antioxidants do and why do we need antioxidants if we need oxygen to survive?
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
How do magnets work?
Science, Physics Caitlin Olson 4/18/24 Science, Physics Caitlin Olson 4/18/24

How do magnets work?

Get ready for a refresher on electrons!

Read More
Why do we use metaphors?
Language, Psychology Caitlin Olson 4/18/24 Language, Psychology Caitlin Olson 4/18/24

Why do we use metaphors?

We use one unique metaphor for every 25 words spoken.

Read More
Why do camels have humps?
Science, Biology, Zoology Caitlin Olson 4/18/24 Science, Biology, Zoology Caitlin Olson 4/18/24

Why do camels have humps?

“My humps, my humps, my lovely, fatty lumps.”

Read More
What is vinegar and how does vinegar preserve food?
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
Newer Posts
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