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Who Invented the Meter?
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…or the metre Try CuriosityStream and learn something new today: http://curiositystream.com/smart ↓ More info and sources below ↓ Why is a meter a meter? The meter is the world’s ultimate measure, but how did it become “the” meter? What is this measurement based on? The story of this revolution in measurement traces its roots to the French Revolution. Scientists decided that an equal and united people should have equal and united measures. So they sent a pair of young astronomers out to measure the world, and invent the meter. Little did they know they’d find nothing but war, deception, and strife along the way. As a result of this ill-fated mission, the meter carries an error that still persists today. Still think the metric system is so perfect? ----------- LEARN MORE: This episode would not have been possible without one incredible book: “The Measure of All Things” by Ken Alder. There’s so much more to this story that we couldn’t fit in the video, and this book has it all. War, madness, deception, shame, spies, the dawn of the Enlightenment, the birth of modern economics, lots more beheadings… Highly recommended! Amazon: http://amzn.to/2lNuEyD Public library: http://www.worldcat.org/oclc/893130606 MORE: Interesting chronology of the meter: http://www.dozenalsociety.org.uk/metrix/chronology.html Calculating the length of a meridian arc: http://www.cantab.net/users/michael.behrend/map_formulae/alt_tr_mercator/pages/meridian_arc.html Williams, Jeffrey H. “Quantifying Measurement: The Tyranny of Numbers.” Morgan & Claypool Publishers, 2016 Murdin, Paul. “Full meridian of glory: perilous adventures in the competition to measure the Earth.” Springer Science & Business Media, 2008. ----------- FOLLOW US: Merch: https://store.dftba.com/collections/its-okay-to-be-smart Facebook: http://www.facebook.com/itsokaytobesmart Twitter: @okaytobesmart @DrJoeHanson Tumblr: http://www.itsokaytobesmart.com Instagram: @DrJoeHanson Snapchat: YoDrJoe ----------- It’s Okay To Be Smart is hosted by Joe Hanson, Ph.D. Director: Joe Nicolosi Writer: Joe Hanson Producer/editor/animator: Andrew Matthews Producer: Stephanie Noone and Amanda Fox Produced by PBS Digital Studios Music via APM Stock images from Shutterstock http://www.shutterstock.com

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(13)
U
Unacademy user
Mam it is highly appreciable that you also covered the middle East part in Asia but throughout this lesson I was hoping for information on Horn of Africa as well like the countries included and their location.
Arpita Prakash
a year ago
Africa is covered separately...please do check...time didn't permit me to include everything here
Anjali Sharma
a year ago
Yes I have watched all the lessons till Oceania but in both Africa part1 and part2 there was no mention of Horn of Africa like the countries included and their location so I had to Google it later. I understand that the lessons are dealing with the countries in different continents and there is also time constraint so everything cannot be covered at once but I request you to make lessons on other facts that are not being dealt with here like tropic of cancer, tropic of capricorn, equator etc. passes through which countries and countries which surround the important oceans gulf etc. It will be really helpful for fresh candidates. Thank you so much.
Arpita Prakash
a year ago
There are many things that I will be covering later, initially I have only done the continents for the sake of name of countries and capitals ...and I have announced in many of the lessons that whatever topics people want me to do, they can mention and I will take note of it. And I will work on those extra topics afterwards as I am beginning the course from basics so will consider other points accordingly ! Hope you understand my concern too and thankyou for the feedback. Point noted !
Anjali Sharma
a year ago
Thank you so much. You are really considerate.
A
annoying video, not interesting at all
thank u so much ma'am. some videos not to be download
please make a video about US currency Watchlist
mentally challenged? speccial child
AK
Please Make in Hindi also
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