In the beginning — before the 1920s, these words had no place in our scientific understanding of the universe. Astronomers believed the cosmos to be eternal and unchanging. We knew of only one galaxy and a few million visible stars, and this was the scope of our observable universe.

Then astronomer Edwin Hubble observed, courtesy of redshift, distant galaxies speeding away from each other and formulated Hubbles Law to explain the universes uniform expansion. Redshift just refers to a distant celestial bodys shift toward longer, or redder, wavelengths, compliments of the Doppler effect.

FREE FACT: An oblate spheroid is a special case of an ellipsoid where two of the semi-principal axes are the same size.

A special thanks to our Subbable.com supporters:
Robby Weisenfeld
Gustav Delius
Ike
www.youtube.com/TheNilFacts

And to Audible.com — FREE audiobook at www.audible.com/minutephysics

MinutePhysics is on Google — bit.ly/qzEwc6
And facebook — facebook.com/minutephysics
And twitter — @minutephysics

Minute Physics provides an energetic and entertaining view of old and new problems in physics — all in a minute!

Music by Nathaniel Schroeder www.soundcloud.com/drschroeder

Thanks to Nima Doroud for contributions. Created by Henry Reich

If you’re not a morning person, then you’d probably love living on the moon or out in space! The whole “lack of oxygen” thing aside, a ‘round-the-clock night sky sounds pretty tempting! But why is there so much light on Earth, but almost none once you leave our planet?

You might think that it’s light during the day and dark at night because the Earth spins on its axis, and the Sun illuminates either hemisphere. That’s part of the reason, but it’s more complicated than that. Our star shines on the Moon too, but the sky above it is always black!

Other videos you might like:
20 Incredible Space Facts That Arent In Textbooks www.youtube.com/watch?v=FfwAKqNM7U0

UPDATE: I’m hearing reports of calendar apps crashing quite severely. Please only experiment on non-vital apps as you could hypothetically lose data stored in them! But apparently if the app crashes and restarts don’t fix it: a forced restart will.

Proceed with caution, at your own risk, and report any findings!

Buy a physical book from Waterstones! bit.ly/humblepi_waterstones

ebook on Amazon: www.amazon.com/s?k=humble pi
Audiobook on Audible: www.audible.co.uk/pd/Humble-Pi-Audiobook/0241375509

Huge thanks to Nick Day and Ken Taylor who emailed me about this bug. If you find anything out, or know someone who might know, email me: matt@standupmaths.com

If you want to read the part of my book about this, here it is. (Dont tell anyone I let you have it for free.)
www.dropbox.com/s/ccloc2ql091l1v5/HumblePi-calenduh.pdf?dl=0

This is the video of me talking about the Boeing 787 Dreamliner and the Los Angeles Air Traffic Control Route Center problems.
www.youtube.com/watch?v=HYgqvapH7ak

2^52 microseconds before 1 January 2001
www.wolframalpha.com/input/?i=2^52 microseconds before 1 January 2001
(yes, yes, it is technically off by a microsecond)

CFAbsoluteTime
Type used to represent a specific point in time relative to the absolute reference date of 1 Jan 2001 00:00:00 GMT
developer.apple.com/documentation/corefoundation/cfabsolutetime

Double-precision floating-point format on wikipedia.
en.wikipedia.org/wiki/Double-precision_floating-point_format

CORRECTIONS
— Nothing yet. Let me know if you spot anything!

Thanks to my Patreon supports who do support these videos and make them possible. Here is a random subset:

Toby ONeil
Nate Brown
Jordan Scales
Matthew Holland
Philippe von Bergen
Glenn Watson
Kevin Mannon
David Lake
Lucas Werkmeister
Jan Strohbeck

Support my channel and I can make more videos:
www.patreon.com/standupmaths

Filming and editing by Matt Parker
Music by Howard Carter
Design by Simon Wright

MATT PARKER: Stand-up Mathematician
Website: standupmaths.com/
US book: www.penguinrandomhouse.com/books/610964/humble-pi-by-matt-parker/
UK book: mathsgear.co.uk/products/5b9fa76f230ffa140094dc43
Nerdy maths toys: mathsgear.co.uk/

Matt Parker and a team of Domino Computer Builders balanced over 10,000 dominoes in a carefully designed circuit. The result was a Domino Computer capable of automatically adding numbers. It can take any two four-digit binary numbers and return the five-digit binary sum.

Its a computer, made of dominoes.

Watch the Numberphile where Matt explains more of the maths: youtu.be/lNuPy-r1GuQ
As well as the secret Numberphile bonus interview: youtu.be/rEw2hE8ZRlY

There are free worksheets and teaching resources about binary numbers and logic gates here:
think-maths.co.uk/downloads/domino-computer-worksheets

Computer design:
Matt Parker, Katie Steckles, Paul Taylor, Andrew Taylor, Siân Fryer

Builders:
Ben Curtis, Becky Smedley, Mike Bell, Blair Lavelle, Andrew Pontzen, Jonathan Sanderson, Elin Roberts, Chris Roberts, Ben Ashforth, Gillian Kiernan, David Julyan

Thanks to Marieke Navin, Natalie Ireland, Nicola Frost and everyone at the Museum of Science and Industry who made this possible. www.mosi.org.uk/

Huge thanks to Jonathan Sanderson at StoryCog for making the video. storycog.com/

Download the podcast of my BBC Radio4 show, Domestic Science (Ep1) www.bbc.co.uk/programmes/p02pc9x6/episodes/downloads

In this video I start with how many 256×256 greyscale images are possible and work my way up to the maximum number of possible YouTube videos.

Original question on twitter:
twitter.com/dedwarmo/status/755799688759037953

Here is our radio show on the BBC radio player. Let me know if it does not work for you.
www.bbc.co.uk/programmes/b07lxqq8/episodes/player

Our Festival of the Spoken Nerd DVD and download:
shop.festivalofthespokennerd.com/

Galaxy M81 image credit: NASA/JPL-Caltech/ESA/Harvard-Smithsonian CfA

Music by Howard Carter
Design by Simon Wright

MATT PARKER: Stand-up Mathematician
Website: standupmaths.com/
Maths book: makeanddo4D.com/
Nerdy maths toys: mathsgear.co.uk/

Go check out the puzzles over on Brilliant!
brilliant.org/standupmaths

Use the URL above to help support this video and get 20% off the paid premium versions.

Once you’ve done that: help us calculate the thickness of a three-sided coin!

The bonus video explains how you can get involved. We expanded the audience participation aspect loads after we filmed the main video; which is why a whole second video was required.
youtu.be/xN5_VO7Nbu8

All the links for the various resources are over here.
think-maths.co.uk/threesidedcoin

Here is the form to sign-up and ask nicely to borrow Hugh’s coins.
bit.ly/coinrequest

Buy or print your own cylindrical coins.
www.shapeways.com/shops/mathgrrl?section=Education

tomscott.com — twitter.com/tomscott — In Trinity Buoy Wharf lighthouse in London — and a few other science museums around the world — sits Longplayer, a musical composition designed to last a millennium. How do you keep something running for that long?

Thanks to Rob Blake for holding the camera through the many takes. This one took a while…

And thanks to Martin Deutsch for reminding me about Longplayer!

Мы должны стремиться к самообразованию, ведь каждый человек поднимается ввысь на крыльях собственного любопытства. Так сформулировал основу развития нашей цивилизации Нил Деграсс Тайсон — известный популяризатор науки и директор планетария Хейдена в Американском музее естественной истории. Он обсудил с Ларри Кингом ряд интересных тем. Как соотносятся друг с другом наука и религия? Следует ли опасаться искусственного интеллекта? Реален ли наш мир или это просто программная симуляция?

Подписывайтесь на RTД Russian — www.youtube.com/subscription_center?add_user=rtdrussian

RTД на русском — doc.rt.com/
Vkontakte — vk.com/rtdru
Facebook — www.facebook.com/RTDru/
Twitter — twitter.com/rtd_rus

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