0
Skip to Content
Today You Should Know
๐Ÿ‘‹ About
๐Ÿ“ Articles
๐Ÿซ Anatomy
๐ŸŒŒ Astronomy
๐Ÿฆ  Biology
๐Ÿงช Chemistry
๐ŸŽญ Culture
๐Ÿ”ง Engineering
๐ŸŸ Food & Drink
๐Ÿ“œ History
โœ๏ธ Language
๐Ÿงต Life Skills
๐Ÿงฎ Math
๐ŸŽน Music
๐Ÿงฒ Physics
๐Ÿง  Psychology
๐Ÿ›๏ธ Public Policy
โš™๏ธ Technology
๐Ÿ‹ Zoology
All Articles
๐Ÿ“š Book Recs
๐Ÿฅ— 9 Books about Health & Well-being
๐Ÿค” 18 Books about Things You Might Not Know
๐Ÿ‘จโ€๐Ÿ‘ฉโ€๐Ÿ‘งโ€๐Ÿ‘ฆ 15 Books about Interesting People
๐Ÿ›๏ธ 7 Books about the Present
๐ŸŒž 10 Books about the Past
๐Ÿš€ 2 Books about the Future
All Book Recommendations
๐Ÿค” Submit a Question
๐Ÿฆ„ Weird Wikipedia
Subscribe
Today You Should Know
๐Ÿ‘‹ About
๐Ÿ“ Articles
๐Ÿซ Anatomy
๐ŸŒŒ Astronomy
๐Ÿฆ  Biology
๐Ÿงช Chemistry
๐ŸŽญ Culture
๐Ÿ”ง Engineering
๐ŸŸ Food & Drink
๐Ÿ“œ History
โœ๏ธ Language
๐Ÿงต Life Skills
๐Ÿงฎ Math
๐ŸŽน Music
๐Ÿงฒ Physics
๐Ÿง  Psychology
๐Ÿ›๏ธ Public Policy
โš™๏ธ Technology
๐Ÿ‹ Zoology
All Articles
๐Ÿ“š Book Recs
๐Ÿฅ— 9 Books about Health & Well-being
๐Ÿค” 18 Books about Things You Might Not Know
๐Ÿ‘จโ€๐Ÿ‘ฉโ€๐Ÿ‘งโ€๐Ÿ‘ฆ 15 Books about Interesting People
๐Ÿ›๏ธ 7 Books about the Present
๐ŸŒž 10 Books about the Past
๐Ÿš€ 2 Books about the Future
All Book Recommendations
๐Ÿค” Submit a Question
๐Ÿฆ„ Weird Wikipedia
Subscribe
๐Ÿ‘‹ About
Folder: ๐Ÿ“ Articles
Back
๐Ÿซ Anatomy
๐ŸŒŒ Astronomy
๐Ÿฆ  Biology
๐Ÿงช Chemistry
๐ŸŽญ Culture
๐Ÿ”ง Engineering
๐ŸŸ Food & Drink
๐Ÿ“œ History
โœ๏ธ Language
๐Ÿงต Life Skills
๐Ÿงฎ Math
๐ŸŽน Music
๐Ÿงฒ Physics
๐Ÿง  Psychology
๐Ÿ›๏ธ Public Policy
โš™๏ธ Technology
๐Ÿ‹ Zoology
All Articles
Folder: ๐Ÿ“š Book Recs
Back
๐Ÿฅ— 9 Books about Health & Well-being
๐Ÿค” 18 Books about Things You Might Not Know
๐Ÿ‘จโ€๐Ÿ‘ฉโ€๐Ÿ‘งโ€๐Ÿ‘ฆ 15 Books about Interesting People
๐Ÿ›๏ธ 7 Books about the Present
๐ŸŒž 10 Books about the Past
๐Ÿš€ 2 Books about the Future
All Book Recommendations
๐Ÿค” Submit a Question
๐Ÿฆ„ Weird Wikipedia
Subscribe
What happens in your body when you sneeze?
Anatomy Caitlin Olson 6/5/25 Anatomy Caitlin Olson 6/5/25

What happens in your body when you sneeze?

I hope you achoo-se to open this article

Read More
How will 3D printing organs work?
Anatomy, Technology Caitlin Olson 4/24/25 Anatomy, Technology Caitlin Olson 4/24/25

How will 3D printing organs work?

This ainโ€™t your grandma's HP printer

Read More
What makes you feel full when you're eating?
Anatomy, Food & Drink Caitlin Olson 3/27/25 Anatomy, Food & Drink Caitlin Olson 3/27/25

What makes you feel full when you're eating?

Are you hungry for a human anatomy lesson?

Read More
Why does your voice sound different on a recordingโ€‹?
Anatomy, Physics, Psychology Caitlin Olson 3/6/25 Anatomy, Physics, Psychology Caitlin Olson 3/6/25

Why does your voice sound different on a recordingโ€‹?

Hear me out โ€” your ears are deceiving you

Read More
Why does traveling make you tired?
Anatomy, Physics Caitlin Olson 2/20/25 Anatomy, Physics Caitlin Olson 2/20/25

Why does traveling make you tired?

Going from point A to point Zzzzzzz

Read More
What causes the "butterflies in your stomach" feeling?
Anatomy Caitlin Olson 2/13/25 Anatomy Caitlin Olson 2/13/25

What causes the "butterflies in your stomach" feeling?

Fight, flightโ€ฆ or flirt?

Read More
Why do paper cuts hurt so much?
Anatomy, Physics Caitlin Olson 2/6/25 Anatomy, Physics Caitlin Olson 2/6/25

Why do paper cuts hurt so much?

Donโ€™t worry. You're safe if you didn't print this article.

Read More
Why are people ticklish?
Anatomy Caitlin Olson 1/16/25 Anatomy Caitlin Olson 1/16/25

Why are people ticklish?

And why are others immune?

Read More
Why do you feel sore the day after a workout?
Anatomy Caitlin Olson 12/19/24 Anatomy Caitlin Olson 12/19/24

Why do you feel sore the day after a workout?

I think weโ€™ve all done the Post-Workout Waddle Walk

Read More
Why does salt make food taste better?
Anatomy, Food & Drink, Chemistry Caitlin Olson 10/3/24 Anatomy, Food & Drink, Chemistry Caitlin Olson 10/3/24

Why does salt make food taste better?

Our least bland article yet

Read More
Why do joints crack?
Anatomy Caitlin Olson 9/26/24 Anatomy Caitlin Olson 9/26/24

Why do joints crack?

And why does it feel so good?

Read More
Why do my joints creak after yoga?
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
Why does your funny bone hurt when you hit it?
Science, Anatomy, Biology Caitlin Olson 9/14/24 Science, Anatomy, Biology Caitlin Olson 9/14/24

Why does your funny bone hurt when you hit it?

Hint: Youโ€™re not actually hitting the bone.

Read More
Why is dental insurance separate from medical insurance?
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
Why do I cry when I laugh hard?
Science, Psychology, Anatomy, Biology Caitlin Olson 9/14/24 Science, Psychology, Anatomy, Biology Caitlin Olson 9/14/24

Why do I cry when I laugh hard?

We donโ€™t know for sure, but crying and laughing are both ways that your brain soothes you and reduces stress. Crying while laughing could also just be because your tear ducts are getting stimulated by your face muscles.

Read More
Why do dogs have an extra paw pad on their front legs?
Science, Biology, Zoology, Anatomy Caitlin Olson 9/13/24 Science, Biology, Zoology, Anatomy Caitlin Olson 9/13/24

Why do dogs have an extra paw pad on their front legs?

These corn-chip-smelling paw pads serve a helpful purpose.

Read More
Why are most people right-handed?
Science, Anatomy Caitlin Olson 8/15/24 Science, Anatomy Caitlin Olson 8/15/24

Why are most people right-handed?

Letโ€™s get right to it.

Read More
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
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?

โ€œMy humps, my humps, my lovely, fatty lumps.โ€

Read More
Why do we rub our eyes when we are tired?
Science, Anatomy, Biology Caitlin Olson 4/17/24 Science, Anatomy, Biology Caitlin Olson 4/17/24

Why do we rub our eyes when we are tired?

Itโ€™s an instinct that prepares us for sleep. But you might want to think twice before doing it.

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 ๐Ÿ‘‡

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

Learn five facts about Caitlin.

Caitlin

Recent Articles

About

Book Recommendations

Privacy Policy