Elio - Communiverse Clip
Elio
Elio - Teaser Clip 2
Elio
Thunderbolts* - Official Behind the Scenes Clip
Thunderbolts*
Superman - James Gunn at Rio Fan Event
Superman
Black Bag - Cate Blanchett Exclusive Interview
Black Bag
Eddington - Matt Gomez Hidaka at LA Premiere
Eddington
Lilo & Stitch - Noisy Moviegoer Clip
Lilo & Stitch
Heads of State - Producers and Creative Team at Red Carpet Premiere
Heads of State
Elio - Freeze Frame Clip
Elio
Relay - Riz Ahmed as Tom
Relay
In The Lost Lands - Dave Bautista Exclusive Interview
In the Lost Lands
Eden - Jude Law and Daniel Brühl with the Gun
Eden
Elio - Teaser Clip
Elio
Eddington - Luke Grimes at LA Premiere
Eddington
Elio - Gift Bag Beam Me Write Up Clip
Elio
She Rides Shotgun - Official Teaser Poster
She Rides Shotgun
PBS Space Time

PBS Space Time Season 2015: Episode Guide & Ratings

Watch 'PBS Space Time' Season 2015 Online

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Season 2015 Episodes

1. What Planet is Super Mario World?

February 11th, 20157 min

We've run, jumped, and stomped all over the world of Super Mario, but, where in the universe is Super Mario EXACTLY? It's virtual so it obviously DOESN'T exist, but if it did, could Super Mario world be in our solar system? And what do the planet's dynamics reveal about Mario's crazy jumping ability? Join Gabe as he takes us on a rick-roaring tour of our known universe as we search for the answer in this week's SpaceTime!

2. Is It Irrational to Believe in Aliens?

February 18th, 20158 min

Aliens! Could humans really be alone in this expansive universe? And if we're not, how come we've never made contact with other intelligent life? Everyone's thought about it; especially members of the scientific community. Join Gabe as he presents some of the most popular theories that scientists use to rationalize their support or skepticism of the existence of aliens. We may never know the answer to this age old question, but a little scientific thinking never hurt anybody!

3. How Do You Measure the Size of the Universe?

February 25th, 20157 min

The universe is HUGE. But, there is only so much of the universe we can ACTUALLY see, and if we wanted to measure that FINITE space, how would we do it? A gigantic ruler? One really long car ride? Or maybe it's something even more spectacular, something that involves not only the observable universe as it is NOW, but how it was when it was first BORN?

4. Should We Colonize Venus Instead of Mars?

March 4th, 20158 min

Mars One. The Mars Rover. Bruno Mars. Mars Bars. It's pretty clear we're OBSESSED with the idea of Mars, especially in regard to it being a potential colony for earthlings. But is that really the best option? Is there a better place for us to colonize in our solar system? Well, how about Venus? Sure the surface temperature is over 450 degrees Celsius, with crazy pressure, but there might be a smart way around that, making Venus a better option for long term colonization than Mars!

5. What Will Destroy Planet Earth?

March 11th, 20159 min

Killing all the life on Earth is easy. But what about destroying the planet itself? That is DEFINITELY going to happen!! But HOW? Could it be Nukes? A Giant Asteroid? A Collision with another planet? And what’s more, will anyone be around to actually watch the world reach its ultimate demise?

6. Can A Starfox Barrel Roll Work In Space?

March 18th, 201510 min

DO A BARREL ROLL! Or at least, try…? The iconic move from Star Fox seems so easy, just press a button and BOOM. The ship rolls. But HOW? Barrel rolls in atmosphere are easy to execute with the use of ailerons, but in space, it's a different issue altogether. With no atmosphere (and no thrusters), how does one Barrel Roll like Star Fox in space?

7. Cosmic Microwave Background Explained

March 25th, 20158 min

HAS SPACE ALWAYS BEEN BLACK? As long as we've been around, YES. But the universe gets much more exciting, AND much BRIGHTER, as we start winding our clocks back to the early days of the universe. Near the beginning of the universe, when space was rapidly expanding, that dark night sky we know so well as actually…ORANGE! But why? Did the lights just go out, or did something more spectacular happen?

8. Is the Moon in Majora’s Mask a Black Hole?

April 1st, 201510 min

Is Link in Majora's Mask actually being overseen by a Black Hole (with teeth)? It's easy to take things at face value in video games. But when we take a deeper dive into the physics in The Legend of Zelda: Majora's Mask, it seems that the "MOON" might be one of those things that isn't quite what it seems. Given its size and the way it affects Termina, it actually appears that the moon is really a BLACK HOLE! Is that seriously the only possibility? What is the evidence that supports this theory?

9. Could You Fart Your Way to the Moon?

April 8th, 20159 min

Listen, we know you've thought about it, and we're here to give you THE DEFINITIVE ANSWER to one of the greatest science questions of all time. How long would it take to get to the MOON by farting?

10. How to Weigh a Fart

April 9th, 20152 min

EVER WANTED TO WEIGH A FART? Well, it isn't easy, but walk through the math, physics, and science behind farts and how to measure them!

11. Could NASA Start the Zombie Apocalypse?

April 15th, 20157 min

12. Are Space and Time An Illusion?

April 22nd, 20159 min

13. What's the Most Realistic Artificial Gravity in Sci-Fi?

April 29th, 201512 min

14. Should the First Mars Mission Be All Women?

May 6th, 201511 min

15. 9 NASA Technologies Shaping YOUR Future

May 13th, 201510 min

16. The Real Meaning of E=mc²

May 20th, 201511 min

17. Habitable Exoplanets Debunked!

May 27th, 201511 min

18. Is Gravity An Illusion?

June 3rd, 201513 min

19. Challenge: What Happens to a Helium Balloon in Freefall?

June 10th, 20152 min

20. How to Signal Aliens

June 17th, 201512 min

21. The Calendar, Australia & White Christmas

June 24th, 20158 min

22. Can a Circle Be a Straight Line?

July 2nd, 201511 min

23. Curvature Demonstrated + Comments

July 8th, 20157 min

24. The Leap Second Explained

July 8th, 20153 min

25. Can You Trust Your Eyes in Spacetime?

July 15th, 201510 min

Last time we talked about what curvature means, looked at geodesics, great circles on spheres, and tried to understand the notion of "straightness". This week on Spacetime, we take a detour into how geometry works in spacetime. Get excited, because this episode is even more mind-bending than the last!

26. SPECIAL ANNOUNCEMENT + Flat Spacetime Geometry Comments

July 22nd, 20157 min

27. General Relativity & Curved Spacetime Explained!

July 29th, 20159 min

28. What Physics Teachers Get Wrong About Tides!

August 5th, 201516 min

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!

29. Challenge: Which Particle Wins This Race?

August 12th, 20157 min

30. Do Events Inside Black Holes Happen?

August 19th, 201515 min

31. Watch THIS! (New Host + Challenge Winners)

August 27th, 20156 min

32. Does Dark Matter BREAK Physics?

September 23rd, 201511 min

33. What Happens At The Edge Of The Universe?

September 30th, 201510 min

Lots of people believe the Universe is infinite, but there's a good possibility that might not be the case. Which means that there would be an actual edge of the Universe. What happens at that edge? Is there a restaurant? Join Matt on this week’s episode of Space Time as he explores the greatest expanses of our Universe. So what do you find when you reach the edge? More Universe? Bubble Universes? Back where you started?! Check out this episode of Space Time to find out!

34. The Speed of Light is NOT About Light

October 7th, 201513 min

35. 5 REAL Possibilities for Interstellar Travel

October 15th, 201514 min

36. Have Gravitational Waves Been Discovered?!?

October 22nd, 201512 min

37. Is The Alcubierre Warp Drive Possible?

October 28th, 201510 min

38. Why Haven't We Found Alien Life?

November 5th, 201513 min

39. Challenge: Can you save Earth from a Killer Asteroid?

November 11th, 20154 min

40. 5 Ways to Stop a Killer Asteroid

November 18th, 201512 min

41. 100 Years of Relativity + Challenge Winners!

November 25th, 20159 min

42. How to Build a Black Hole

December 9th, 201514 min

43. The Higgs Mechanism Explained

December 16th, 201510 min

All Seasons

Season 2025

Season 2025

Jan 16, 2025
Season 2024

Season 2024

Jan 10, 2024
Season 2023

Season 2023

Jan 11, 2023
Season 2022

Season 2022

Jan 12, 2022
Season 2021

Season 2021

Jan 12, 2021
Season 2020

Season 2020

Jan 6, 2020
Season 2019

Season 2019

Jan 9, 2019
Season 2018

Season 2018

Jan 10, 2018
Season 2017

Season 2017

Jan 4, 2017
Season 2016

Season 2016

Jan 6, 2016
Season 2015

Season 2015

Feb 11, 2015
Season 1

Season 1

Feb 11, 2015
Specials

Specials

Apr 10, 2017