Why is the abbreviation for the unit of weight, pounds LBS? Where did the metric system come from in the first place? Why is it so confusing to figure out if the USA an adopter of the metric system or not? Is there a metric system for time?

.. we explain like I'm five

Thank you to the r/explainlikeimfive community and in particular the following users whose questions and comments formed the basis of this discussion: stratocast7, londonpilot, wengerista, foxmt, tmdaniel, invincibill, voltronforlife and carbondnb

To the ELI5 community that has supported us so far, thanks for all your feedback and comments. Join us on Twitter:

https://www.twitter.com/eli5ThePodcast/

or send us an e-mail:

[email protected]

Where did the word ketchup come from? Why do the Cantonese and Malaysians both claim it originated from their languages? Where does the Indonesian, French and Arabic connections come in? What makes Ketchup special as a non-Newtonian fluid?

... we explain like I'm five

Thank you as always to the r/explainlikeimfive community.

To the ELI5 community that has supported us so far, thanks for all your feedback and comments. Join us on Twitter:

https://www.twitter.com/eli5ThePodcast/

or send us an e-mail:

[email protected]

Are tomatoes a fruit or vegetable? Why is ketchup considered a legal vegetable in California? Why are sun-dried tomatoes safe to eat, while eating a tomato you left on the windowsill for too long would probably make you ill? How can restaurants leave ketchup and mustard out all day but the bottles you buy in the store say to refrigerate after opening?

... we explain like I'm five

Thank you to the r/explainlikeimfive community and in particular the following users whose questions and comments formed the basis of this discussion: spczippo, cbd03b, lolgobbz, kgisaboss, amoeba, sadoni, oneandonlyjackschitt and barrysquatter

To the ELI5 community that has supported us so far, thanks for all your feedback and comments. Join us on Twitter:

https://www.twitter.com/eli5ThePodcast/

or send us an e-mail:

[email protected]

What is the Streisand effect? How was Barbara Streisand involved? Why is it such a universal from China to South Africa? What are the implications of the Streisand Effect in recent ‘right to be forgotten’ legal cases?

... we explain like I'm five

As always, thank you to the r/explainlikeimfive community.

To the ELI5 podcast community that has supported us so far, thanks for all your feedback and comments. Join us on Twitter:

https://www.twitter.com/eli5ThePodcast/

or send us an e-mail:

[email protected]

Could you give a person with Alzheimer's a fact sheet to carry with them, reminding them of every truth about them, including the fact that they have Alzheimer's? What is the difference between Alzhiemers and Dementia? What causes Alzheimer's disease? What were the breakthroughs of the 1990s? What were the recent breakthroughs that made the news?

... we explain like I'm five

Thank you to the r/explainlikeimfive community and in particular the following users whose questions and comments formed the basis of this discussion: lordica, waspocracy, angelamotorman, carduus_benedictus and mistermarchmont

To the ELI5 community that has supported us so far, thanks for all your feedback and comments. Join us on Twitter:

https://www.twitter.com/eli5ThePodcast/

or send us an e-mail:

[email protected]

If I send a letter or postcard from the UK to the USA, who gets money from my stamp? Once it reaches the receiving country, what makes them obliged to deliver my letter if they are not receiving payment for it? When was the global system for postage established? How does overnight shipping get where it's going faster than a normal package? Why not make everything overnight?

... we explain like I'm five

Thank you to the r/explainlikeimfive community and in particular the following users whose questions and comments formed the basis of this discussion: riconquer2, riphitter, rhynod, psunavy03, prudent-artist-274, p33k4y, arcturusflyer and admirable_cry_3795

To the ELI5 community that has supported us so far, thanks for all your feedback and comments. Join us on Twitter:

https://www.twitter.com/eli5ThePodcast/

or send us an e-mail:

[email protected]

How and when did the food pyramid originate? What has since replaced it? What is the Sweden connection? Why have many people been critical of the food pyramid? What is the hamburger question?

... we explain like I'm five

Thank you to the r/explainlikeimfive community and in particular the following users whose questions and comments formed the basis of this discussion: paul277, andyfox1979, comissaraj, jbass55, caboosetp and overim

To the ELI5 community that has supported us so far, thanks for all your feedback and comments. Join us on Twitter:

https://www.twitter.com/eli5ThePodcast/

or send us an e-mail:

[email protected]

Why do cardio machines require you to put two hands on them to measure your heart beat when a wrist watch can do it just with one wrist? What’s the difference between an ECG and EKG? Which types of monitor is most accurate?

... we explain like I'm five

Thank you to the r/explainlikeimfive community and in particular the following users whose questions and comments formed the basis of this discussion: saltyson32, internetboyfriend666, blindedbythesight, iuse2bgood, vexx_nl, angryocelot and notwearingatie

To the ELI5 community that has supported us so far, thanks for all your feedback and comments. Join us on Twitter:

https://www.twitter.com/eli5ThePodcast/

or send us an e-mail:

[email protected]

What is a run on the bank? Why it can happen in a fractional reserve banking system? What’s the best thing to do when there’s a bank run? When was the first bank run? Can we prevent bank runs?

... we explain like I'm five

Thank you to the r/explainlikeimfive community and in particular the following users whose questions and comments formed the basis of this discussion.

To the ELI5 community that has supported us so far, thanks for all your feedback and comments. Join us on Twitter:

https://www.twitter.com/eli5ThePodcast/

or send us an e-mail:

[email protected]

Why do people in the UK typically say Happy Christmas while in America it is most commonly Merry Christmas? What made red and green Christmas colors? Is it true that Coca-Cola popularized the modern look of Santa Claus? Why do most of our "traditional" Christmas songs, images and TV/movies come from the 1940s to the 1960s? Brian Earl from the Christmas Past podcast joins us to ELI5 a range of Xmas questions.

... and we explain like i'm five!

Help more people fund us by leaving a rating on iTunes.

Thank you to Brian Earl from the Christmas Past podcast. If you'd like to hear more excellent xmas episodes, check out Brian's podcast here:

https://christmaspast.media/

To the ELI5 community that has supported us so far, thanks for all your feedback and comments. Join us on Twitter:

https://www.twitter.com/eli5ThePodcast/

or send us an e-mail:

[email protected]