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SPACETIME IS BACK! And with this episode we welcome in Matt O’Dowd as the new host to rigorously take you through the mysteries of space, time, and the nature of reality. We’re starting off this new season with perhaps one of the most mysterious things of all — DARK MATTER. What is it? Where does it come from? And is it even real? Watch this episode of Space Time to find out!

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Comment Links

SafetySkull
https://www.youtube.com/watch?v=vNaEBbFbvcY&lc=z13zunhjrov4sdl2n22zjlq5fsumsbib304

Agen0000
https://www.youtube.com/watch?v=vNaEBbFbvcY&lc=z132eztqnvzoft4qb04ccpnyglqmfhm5hu40k

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Let us know what topics you want to learn more about:http://bit.ly/spacetimepoll

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Email us! pbsspacetime [at] gmail [dot] com
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Hey Spacetimers! The time has finally come – on this weeks episode of Spacetime we reveal the answers to our 2-Particle Challenge, as well as our winners! Unfortunately, Gabe must bid us farewell – but not before introducing (in the most epic way), Space Time’s new host!

Solutions:
http://bit.ly/particle_challenge

ABOUT MATT O’DOWD:
Matt O’Dowd spends his time studying the universe, especially really far-away things like quasars, super-massive black holes, and evolving galaxies. He uses telescopes in space to do it, and if those aren’t good enough he sometimes adds entire galaxies as gravitational lenses. Matt completed his Ph.D. studies at NASA’s Space Telescope Science Institute, followed by work at the University of Melbourne and Columbia University. He’s now a professor at the City University of New York and an Associate at the American Museum of Natural History’s Hayden Planetarium.

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Congratulations To Our Winners!

Newtonian Challenge:
Farbod Torabi
Elias Simon
Rahul Poddar
Eduardo Vila
Donald Loveland

Einsteinian Challenge:
Nick Lucid
Daniel Grimmer

If your name is listed above be sure to email pbsspacetime@gmail.com with your Full Name, Full Mailing Address, and preferred T-Shirt Size (small, medium, large, extra large etc.)

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Let us know what topics you want to learn more about:http://bit.ly/spacetimepoll

Are all people on Earth really connected through just six steps?
There’s much more science in this than I initially expected. It turns out ordered networks with a small degree of randomness become small-work networks. This is why your acquaintances turn out to be more important in job searches and finding new opportunities than close friends.

DON’T SEND ME AN EMAIL anymore…
1. Do not send it directly to me unless you know me.
2. Send the email to someone you have met IN PERSON and know on a first name basis AND THEY KNOW YOU.
3. Make the subject line ‘Six Degrees of Veritasium’
4. Explain that you’re trying to get this email to me and ask them to forward it on to me (only if they know me IRL) or someone they know who might know me.
5. If your email reaches me by Sept. 1, 2015 I will email you back and ask for your address so I can send you a postcard.

Animations in this video by The Lyosacks: https://www.youtube.com/user/TheLyosacks

There are some great books on this topic:
Duncan Watts, Six Degrees: The Science of a Connected Age
Albert-Laszlo Barabasi, Linkds: How Everything is Connected to Everything Else

And here are articles I referred to:
Milgram’s small world experiment: http://www.uvm.edu/~pdodds/files/papers/others/1969/travers1969.pdf
http://snap.stanford.edu/class/cs224w-readings/milgram67smallworld.pdf

Granovetter, Strength of Weak Ties:
https://sociology.stanford.edu/sites/default/files/publications/the_strength_of_weak_ties_and_exch_w-gans.pdf

Sign Up on Patreon to get access to the Space Time Discord!
https://www.patreon.com/pbsspacetime

Sign up for the mailing list to get episode notifications and hear special announcements!
https://mailchi.mp/1a6eb8f2717d/spacetime

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https://pbsspacetime.com/

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Black holes! From Stephen Hawking to Interstellar, black holes are mammoths in the world of science AND sci-fi. But what exactly IS a black hole? Do events happen inside black holes? Are black holes really a hole? Are black holes really black?! Join Gabe on this week’s episode of PBS Space Time as he debunks popular black hole misconceptions, and rethinks what the term, ‘black hole’, even means. Thought you knew what a black hole was? Think again!

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Comment Links

hauslerful
https://www.youtube.com/watch?v=pwChk4S99i4&lc=z12ct3gh0qydgpze422ldfqw3ue0xhnoc04

Andrew Brown
https://www.youtube.com/watch?v=pwChk4S99i4&lc=z121d3lrjsqnvpcz404cilxpznycs3rinls0k

Ivan Chagas
https://www.youtube.com/watch?v=pwChk4S99i4&lc=z12chtix2oajdnew504cf50jmpykwpr4wao

ErgoCogita
https://www.youtube.com/watch?v=pwChk4S99i4&lc=z13aglkq0wukvbct322ljf0oywnmzpavt

The Science Asylum
https://www.youtube.com/watch?v=pwChk4S99i4&lc=z12wcfyx1wertxkld231wbazntrtcb43d

Romesh Srivastava
https://www.youtube.com/watch?v=pwChk4S99i4&lc=z121hpt5zlysivs1u23einxhfuymunhqi04

shoofle
https://www.youtube.com/watch?v=pwChk4S99i4&lc=z121dvyj2xzei3aj104ce3kqvofucd5rr3o

gottabweird
https://www.youtube.com/watch?v=pwChk4S99i4&lc=z12qevf4ku2mcbtmv22auzkanyfxzxtpo04

Madhu Sujan Paudel
https://www.youtube.com/watch?v=pwChk4S99i4&lc=z134vt0g0qnfupqui22zzb4wqszxuprmh

Tim VanBuren
https://www.youtube.com/watch?v=pwChk4S99i4&lc=z12iuftarmnjsnonh23ezfl5cwmmglkfn

Dox
https://www.youtube.com/watch?v=pwChk4S99i4&lc=z13dztcqquy4ihqdk23celmxjnfgcdzcb

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Let us know what topics you want to learn more about:http://bit.ly/spacetimepoll

I am working on some big new projects I’m excited to share with you!

So this video is a little different from most of the others. The channel is an element of truth, after all, not an element of science. This is my truth. It may not be everyone’s but that’s ok too.

Clips included were from:
Chernobyl and Pripyat – drone shots from shooting Uranium
Obsidian dome, California
Panum Crater
El Capitan
The Pyramids of Giza
Toronto buildings
The Holocaust Memorial in Berlin
Abu Simbel temple at Aswan, Egypt
Sydney Harbour
Milky way time-lapse from the badlands of South Australia
Sunset over Warrnambool, Victoria
Big Bang animation courtesy of NASA
Sunrise over Bondi
Water off New Caledonia
Great white sharks in the Neptune Islands, South Australia
Crosswalk at Town Hall Sydney
EDUtubers at the YouTube EDU summit in San Francisco
Concert in Sydney
Jetpacking in Western Sydney
Vi’s triangles at Perimeter Institute, Waterloo Canada
Aurora Borealis north of Fairbanks Alaska
Sagrada Familia, Barcelona, Spain
Hiking with MinutePhysics in Washington State

Music Licensed from cuesongs.com “The Secret Tower” by Nicholas O

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It’s time for another t-shirt challenge question! Make sure you’re brushed up on your math and high-school level physics before trying this one! There will be 5 winners from each challenge! Do NOT submit to both!

Email your answers to: pbsspacetime@gmail.com before 5pm NYC time August 24, 2015.

Make SURE you title your email: “Two-particle Newtonian gravity challenge”

For the Einsteinian challenge title your email: “Two-particle Einsteinian gravity challenge”

Good luck! And we will see you next week on Spacetime for Gabe’s final episode.

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Let us know what topics you want to learn more about:
http://bit.ly/spacetimepoll

Tweet at us! @pbsspacetime
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Email us! pbsspacetime [at] gmail [dot] com
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We all know tides have something to do with gravity from the Moon and Sun, but if gravity affects the motion of all objects equally, then how come oceans have large tides while other bodies of water don’t? It’s because your mental picture of the tides is probably WRONG!!! Join Gabe on this week’s episode of PBS Space Time as he sets the record straight on tidal force, gravitational differential and what role the moon actually plays in tides. Why don’t lakes have tides? Watch the episode to find out!

Emily Rice (NASA Space Apps Challenge talk on Exoplanet Atmospheres):
https://www.youtube.com/watch?v=rYGTZkueKWc&t=6s
https://about.me/emilyrice

Sean Carroll (lecture notes on general relativity):
http://ned.ipac.caltech.edu/level5/March01/Carroll3/Carroll4.html

For Additional Info on tides:
https://www.youtube.com/watch?v=gftT3wHJGtg https://www.youtube.com/watch?v=KlWpFLfLFBI

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COMMENTS:

Johan ‘t Hart
https://www.youtube.com/watch?v=AwhKZ3fd9JA&lc=z13mz50oqu2liptvs22qv5vjunjvv3ctp

Marcos MH
https://www.youtube.com/watch?v=AwhKZ3fd9JA&lc=z122splo5zukxlg5104cc11p5qm0yrtxojc

Campbell McLauchlan
https://www.youtube.com/watch?v=AwhKZ3fd9JA&lc=z12dzpx4ypz4yhap304cc1tz4n2jjxnw5us0k

Pedro Gusmão
https://www.youtube.com/watch?v=AwhKZ3fd9JA&lc=z13ghfv5uk33yxbgk04cidsxspyutv4wpek

Michael Winter
https://www.youtube.com/watch?v=AwhKZ3fd9JA&lc=z13jtluhgpqpzzzym04cjn0ytqf5tlyje3o

Anthony Englert (antenglert)
https://www.youtube.com/watch?v=AwhKZ3fd9JA&lc=z133y1ubnrisir5if04cijxqtnuadf3ixg0

Ciroluiro
https://www.youtube.com/watch?v=AwhKZ3fd9JA&lc=z13ngtg43pivcxqiy04cdjgilsjmfxoqivo0k

electrocat1
https://www.youtube.com/watch?v=AwhKZ3fd9JA&lc=z123xd3r3yv2ibcwz04cj5szrwi0hpcqpso0k

dligac
https://www.youtube.com/watch?v=AwhKZ3fd9JA&lc=z13asf4xanerxr1pq04cfvyzpufmvvmzdks0k

KRIGBERT
https://www.youtube.com/watch?v=AwhKZ3fd9JA&lc=z13bzh5zkqi1cdg3w22gz3qjaxj4enxuo

Mark G
https://www.youtube.com/watch?v=AwhKZ3fd9JA&lc=z13mhvy4xu3yz5tbi04cchkhnwv2wvbhgws0k

Arunabha D.
https://www.youtube.com/watch?v=AwhKZ3fd9JA&lc=z13scbwp5zqahb5p404cfh344tfjf3th2tk0k

Iwon’t tellmyname
https://www.youtube.com/watch?v=AwhKZ3fd9JA&lc=z12iwfmxxny2zfird04cep1pbyerjvx5wtw0k

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Let us know what topics you want to learn more about:
http://bit.ly/spacetimepoll

When evolution favours a stable ratio of traits rather than one dominant trait.
Check out Audible: http://bit.ly/AudibleVe
Animation by The Lyosacks: https://www.youtube.com/TheLyosacks

Hosting Neil Degrasse Tyson, info and tickets: http://bit.ly/NDTandVe
Aug. 22 in Sydney
Aug. 23 in Canberra

Special thanks to Richard Dawkins

Filmed at Academia Film Olomouc with help from Martyn Marek

Music by Kevin MacLeod http://www.incompetech.com ‘Marty Gots a Plan’ ‘Sing Along with Jim’

The Final Installment of our General Relativity Series!!!

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We’ve been through the first few episodes of our crash course on general relativity, and came out alive! But it’s officially “time” for CURVED spacetime. Join Gabe on this week’s episode of PBS Space Time as he discusses Newton and Einstein’s dispute over inertial frames of reference. Is Einstein’s theory inconsistent? Is gravity even a force??? Check out the episode to find out!

Previous Installments of the General Relativity Series:

“Are Space And Time An Illusion?”:
https://www.youtube.com/watch?v=YycAzdtUIko

“Is Gravity An Illusion?”
https://www.youtube.com/watch?v=NblR01hHK6U

“Can A Circle Be A Straight Line?”
https://www.youtube.com/watch?v=D3GVVkPb3OI

“Can You Trust Your Eyes In Spacetime?”:
https://www.youtube.com/watch?v=P4rW_pPbD-U

Let us know what topics you want to learn more about:
http://bit.ly/spacetimepoll

What was the procedure to launch a nuclear missile?
Uranium premieres: July 28 & 29 on PBS at 10pm ET/ 9pm Central
France and Germany: July 31 at 10pm on ZDF/arte
Norway: August 5 & 6 at 21:30 on NRK2
Australia: August 9, 16, 23 at 8:30pm on SBS
Sweden: TBD
Middle East: TBD

For more information on other screenings go to
https://www.facebook.com/uraniumtwistingthedragon
http://www.genepoolproductions.com

A big thank you to The Titan Missile Museum, Yvonne and Chuck.
http://www.titanmissilemuseum.org/

Space footage courtesy of NASA