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Ask a Spaceman!

AaS! 96: Hey, who took all the antimatter?

Ask a Spaceman!

Paul M. Sutter

Astrophysics, Science, Cosmos, Holes, Black, Astronomy, Natural Sciences, Universe, Cosmology, Space, Physics

4.8853 Ratings

🗓️ 15 January 2019

⏱️ 23 minutes

🧾️ Download transcript

Summary

Why are matter and antimatter symmetric? What happened in the early universe to make matter win? Do we have any clue as to why? What do puppies have to do with it? I discuss these questions and more in today’s Ask a Spaceman!

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Big thanks to my top Patreon supporters this month: Robert R, Dan M, Evan T, Matthew K, Helge B, Justin, Matt W, Justin G, Kevin O, Duncan M, Corey D, Kirk B, Barbara K, Chris C, Tanya D, George, Tim R, Neil L, Nikolas W, Gordon M, Fenris N, Joe R, Neil P, Gabriella G, Tom S, bryan D, Irene P, Dustin R, Matt C, Iothian53, Steve P, Debra S, Ken L, Alberto M, Ron W, Chris L, Mark R, Alan B, Stephen J, David P, John F, Maureen R, Frank T, Craig B, Jesse A, Ron S, Steven L, Mark R, Jackie R, Ulfert B, Kevin N, Darron R, Hector P, Dave L, Stace J, S Stark, Richard K, Andrew L, Vladimir Z, Carol S, Stephen M, Grace M, Robert K, Jeremy K, Russell W, Thomas S, David B, and Tamara F!

Music by Jason Grady and Nick Bain. Thanks to WCBE Radio for hosting the recording session, Greg Mobius for producing, and Cathy Rinella for editing.

Hosted by Paul M. Sutter, astrophysicist at The Ohio State University, Chief Scientist at COSI Science Center, and the one and only Agent to the Stars (http://www.pmsutter.com).

Transcript

Click on a timestamp to play from that location

0:00.0

I want you to imagine that you're standing in front of a staircase.

0:10.0

Nothing fancy about the staircase, it's just a staircase, but sitting on the steps here and there are a bunch of puppies.

0:19.0

Why puppies? Because once you get the visual of the staircase full of puppies in your head, it's impossible

0:24.5

to forget about it.

0:26.1

The staircase is tall.

0:28.2

It stretches all the way up into the sky, past the clouds, possibly into space, so far

0:33.0

that you can't see the top.

0:34.2

And everywhere you look, puppies.

0:40.2

Sometimes a step will have a few puppies on it some just one some are totally empty and you're at the base of the staircase the ground level

0:46.6

and puppies can move around on their step doing the usual puppy thing that is totally adorable

0:52.3

but they can only jump to higher steps if they're given

0:55.8

a treat, if they're getting a little bit of energy.

0:58.5

If you toss a puppy a little treat, it can just jump up a single step.

1:02.2

If you give it a bunch of treats, it can jump up a bunch of steps.

1:05.6

But the puppies don't like being very high up, so they don't spend a long time to higher

1:09.9

steps.

1:10.3

They all want to be

1:11.3

at the ground level so that they can play with you. But there's only so much room on a step.

1:17.9

Once puppies fill up the bottom step, and there's no more room, and no more puppies will

1:22.8

fit on it, so they start filling up the second step and then once that's filled they fill up the third

1:28.3

and forth and so on until all the puppies on the staircase are as close to the ground level

1:35.1

you know they're as close to you as possible as much as the steps will at them fit and you can give a treat

...

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