SGU Episode 972

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SGU Episode 972
February 24th 2024
"The subsurface ocean of Titan is most likely a non-habitable environment, meaning any hope of finding life in the icy world is dead in the water."
SGU 971                      SGU 973
Skeptical Rogues
S: Steven Novella
B: Bob Novella
C: Cara Santa Maria
J: Jay Novella
E: Evan Bernstein
Guest
CS: Chris Smith, British virologist, science radio broadcaster and writer
Quote of the Week
The spirit of Plato dies hard. We have been unable to escape the philosophical tradition that what we can see and measure in the real world is merely the superficial and imperfect representation of an underlying reality.
Stephen Jay Gould, American paleontologist, evolutionary biologist, and historian of science
Links
Download Podcast
Show Notes
Forum Discussion

Introduction, Eclipse 2024 reminders

Voice-over: You're listening to the Skeptics' Guide to the Universe, your escape to reality.

S: Hello and welcome to the Skeptics' Guide to the Universe. Today is Wednesday, February 21^st, 2024, and this is your host, Steven Novella. Joining me this week are Bob Novella...

B: Hey, everybody!

S: Cara Santa Maria...

C: Howdy.

S: Jay Novella...

J: Hey guys.

S: ...and Evan Bernstein.

E: Good evening folks.

S: How's everyone doing this fine day?

B: Doing good.

C: Doing all right.

E: Not too shabby.

J: All right then.

C: Did the rain finally stop?

S: Yeah, we're finally in the middle of an actual winter with cold weather and snow and everything.

C: Really?

E: Yeah.

B: Fifteen degrees Fahrenheit this morning.

C: Ooh, yikes. We had like three days of nonstop rain after we already had those two intense storms. So more mudslides, more flooding.

E: I heard a lake formed in Death Valley.

C: I heard that too.

E: That's how much rain.

B: What?

E: Yeah.

C: And it's gone already.

E: Outstanding water for several days. Yes.

C: But it's crazy how like powerful the sun is here. I went outside this morning and everything was still really wet and I just let my dog out before recording and it's like almost bone dry outside already.

S: So last, two episodes ago, we were chatting about the eclipse coming up in April. And I wanted to clarify a few things that we said during the discussion. So Evan, you said that the old eclipse glasses or solar glasses may not work, right? That they may expire after a certain amount of time.

E: Yeah. The cheapo ones.

S: So we were questioned about that. So we looked it up to get all the details. And it turns out that what you're saying is true, but it's a little outdated in that in 2015, there was a requirement in the US at least to adhere to international standards in terms of making solar glasses or eclipse glasses. And those do not automatically expire, right? So you could use them theoretically forever. However, there's a big caveat to that. And a lot of sites point this out, is that that assumes they're in good condition, right? So if you packed them away and put them away somewhere safe, yes, you can take them out again four years later or whatever and they're still good. But if you threw them in a drawer somewhere and they're like scratched or damaged in any way, do not use them. So old glasses comes with a lot of caveats. It's only if you've kept them in good condition. Because even a little scratch, that could be-

E: A pinhole could do damage.

S: Yeah. It could do significant damage.

J: Oh, wow. I mean, they're cheap. Just get new ones at this point.

S: Yeah. Why risk it? Just get new ones.

E: Better safe than sorry.

C: And you'll also know if you go outside and put them on and look up, you'll see. That's the thing about eclipse. They're so obvious.

S: Oh, yeah.

C: The sky will be black if you're wearing eclipse glasses in the middle of the day. And the only way that you'll be able to see the sun is if you know where it is and you look straight at it in the glasses.

S: Anything other than looking directly at the sun is pure blackness.

C: Yeah.

S: Right. The other thing is we were talking about when you should use the eclipse glasses and we just made a couple of general comments. But there's a lot of details there too that I was finding out. So one is that, well, of course, I don't think this needs to be said, but we're going to say it anyway. You can never, ever look directly at the sun at any time, at any part of the eclipse. The only time is during total totality. That's the only time you can look directly at the sun is during totality. However, there's one nuance to that that's interesting. At the beginning and at the end of totality, there's the so-called diamond ring effect, right? Where you get a bright rim around the sun.

C: Almost like a little lens flare.

S: Yeah. And it lasts for one to two seconds. So the question is, is it safe to look at that without your solar eclipse glasses on? And like when you say, so here I've read multiple recommendations, but most of the like official recommendations from NASA or astronomy or whatever, they say you have the eclipse glasses on when the diamond ring thing happens. When that is done, then you can take the eclipse glasses off. And then at the end of the eclipse, as soon as you see the diamond ring effect, you have to put your solar glasses back on again.

C: But that part is really, like it takes the amount of time it takes to put glasses on or take them off for that to happen. I think the thing that we have to remember is we're talking about this as if people aren't going to know the difference. It's like, have you ever looked up when the sun was in the sky? Don't look at it. It hurts.

S: Oh, yeah.

E: And that's the reason why...

S: Here's the thing Cara, so this is why there's so much discussion about like, is it safe to look at an eclipse? So you're right. If you look at the sun, it's extremely bright and it's painful. And you know, are your pupils clamped on? You squint, you look away. You can't, you'd have to really try to stare into the sun long enough to burn your retinas. But when enough of the sun is covered, it's the total brightness isn't enough to cause pain or discomfort or to close down your pupils. But that little sliver of light is still bright enough to burn your retina. So that's the most dangerous time is when your protective reflexes aren't in place, but that rim of that crescent of sun is still bright enough to burn your retina. So you're just basically burning up little crescents in your retina while you're looking at the eclipse without that protective effect.

C: I get that. But I also like, I don't know, in my experience, it's not easy to look at the sun until it's in totality. It's a concerted effort. You are still squinting into the sun if you're trying to look at it with your naked eyes, which you should never do. There's a huge difference between a partial eclipse and a total eclipse. It's massive. And so I more say that not because it's like, of course, I think that that's all really, really good advice. I also think, gosh, I hope people already know not to look at the sun with their naked eyes. I say it mostly because a lot of people are really scared of like, when will I know when it's okay? And it's like, you'll know.

S: Yeah, you'll know. It's not subtle.

C: There's a massive difference. It's not something that you have to calculate. It's not something that you have to work out on paper. It's really clear and obvious when you're in partial and when you go into totality.

S: Right. But don't take the lack of pain during partial eclipses thinking it's okay. I can look at, oh, it's not hurting. I can look at that crescent of sun. No, you can't.

C: Right. Yeah. Never look at the sun.

C: Yeah, it will still burn your eyes. It will still burn your retina.

E: Oh, my gosh. Not a good idea. Nope.

S: Yeah. And if you want to risk the one or two seconds of watching the diamond ring, that's fine. Just be careful. Just know that it's very quick. And as soon as that crescent appears, you've got to look away and put your glasses back on or whatever. If you blow the timing, as somebody pointed out, it's like if you try to, at the beginning, if you try to take your glasses off before the diamond ring effect so you see it and you get a glare from the crescent sun, that could also spoil your viewing for a while.

C: It does. Yeah. It bleaches you a little bit. That's true.

S: Yeah. You're not going to be dark adapted.

C: Yeah. Just wear your glasses the whole time. You'll know when-

S: Except in full totality.

C: Yeah. You'll know when totality happens. It will get dark. The minute it gets dark, you can take them off.

E: You will see the stars. That's how dark it will get.

C: Maybe. Depending on where you live. Probably not in LA.

E: You will see the stars.

C: Oh, wait. There is no eclipse in LA.

E: No.

C: You might not in Dallas proper see the stars. You might.

E: No. You will. I think you will. Why wouldn't you?

C: Because of the light pollution.

S: Well, the lights won't be on.

E: But will it illuminate during the day? The streetlights, they're not going to turn the streetlights on all of a sudden.

C: No, but there's a shitload of light pollution all the time. Trust me. If you can't see the stars in a nice clear night in Dallas, you're probably not going to see them in the middle of the day during an eclipse. here's a ton of light pollution.

S: That's interesting. Yeah.

B: There's one star I'm going to see, and I'll be looking at it.

C: Yeah. Well, and you are going to see stars. I mean, I'm just saying it's not going to be like the Milky Way. Don't expect during a total solar eclipse for the sky to suddenly look like Death Valley.

S: It's not going to be a dark sky viewing event.

C: Yeah. And also, there's still light all around the horizon. So like you might see a couple stars if you're in a place where it's relatively easy to see stars.

B: Oh, interesting. Yeah.

C: But it's not like the sky's-

E: Saw stars in Oregon. That's for sure.

C: Yeah. But Oregon is a pretty dark sky. Like there are parts of Oregon that are really dark. I was at least kind of out in the middle of nowhere. Were you also?

E: Yes. Oh, yeah. Absolutely.

C: Most people probably won't be for this. Some people will be along the path, but people who are going to like major metropolitan areas for it.

E: We're in a metropolitan area, I suppose. Yeah. Interesting. I don't know. I've never been in this environment, a metropolitan area during an eclipse. This will be a first.

C: I hear people cheering and stuff. It's really cool.

E: Oh, it's going to be amazing. It's going to be so good. Indescribable.

S: All right, guys. Let's go on with our news items.

News Items

Pesticides in Oats (9:07)

• Pesticide in Oat Products – Should You Worry? 

...micrograms per kilogram (µg/kg)...

AI Video (21:36)

• Sora is an AI model that can create realistic and imaginative scenes from text instructions. 

University Rankings Flawed (36:56)

• University rankings are unscientific and bad for education: experts point out the flaws 

Mewing and Looksmaxxing (47:15)

• From bone smashing to chin extensions: how ‘looksmaxxing’ is reshaping young men’s faces 

Titan Uninhabitable (58:39)

• Saturn's largest moon most likely uninhabitable 

B:...unladen African elephant...

Who's That Noisy? (1:11:51)

Answer to previous Noisy:

Trying to create an echo effect using a reel-to-reel tape machine

New Noisy (1:16:39)

[Wisps, clicks, and bell-like dings]

J:... this week's Noisy...

Announcements (1:17:16)

J: _jay_mentions_Live_1000th_show_from_Chicago_

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Interview with Chris Smith (1:18:57)

• From Wikipedia: Chris Smith - "the Naked Scientist" - is a British consultant virologist and a lecturer based at Cambridge University. He is also a science radio broadcaster and writer, and presents The Naked Scientists, a programme which he founded in 2001, for BBC Radio and other networks internationally, as well as 5 live Science on BBC Radio 5 Live.
• The Naked Scientists: Meet the team

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Science or Fiction (1:49:58)

Theme: Eclipses Item #1: All four gas giants in our solar system experience total solar eclipses, from the perspective of their gassy surfaces. Item #2: On average, any spot on Earth will see a total solar eclipse every 375 years. Item #3: The first recorded accurate prediction of a solar eclipse was in 2300 BC, by Chinese astronomer, Li Shu, for Emporer Zhong Kang.

Answer	Item
Fiction	First recorded prediction
Science	Gas giants' total eclipses
Science	Total eclipse every 375y

Host	Result
Steve	win

Rogue	Guess
Jay	Total eclipse every 375y
Cara	First recorded prediction
Bob	First recorded prediction
Evan	First recorded prediction

Voice-over: It's time for Science or Fiction.

Jay's Response

Cara's Response

Bob's Response

Evan's Response

Skeptical Quote of the Week (2:02:53)

The spirit of Plato dies hard. We have been unable to escape the philosophical tradition that what we can see and measure in the real world is merely the superficial and imperfect representation of an underlying reality.  – Stephen Jay Gould (1941-2002), American paleontologist, evolutionary biologist, and historian of science, from his book The Mismeasure of Man, page 269

Signoff

S: —and until next week, this is your Skeptics' Guide to the Universe.

S: Skeptics' Guide to the Universe is produced by SGU Productions, dedicated to promoting science and critical thinking. For more information, visit us at theskepticsguide.org. Send your questions to info@theskepticsguide.org. And, if you would like to support the show and all the work that we do, go to patreon.com/SkepticsGuide and consider becoming a patron and becoming part of the SGU community. Our listeners and supporters are what make SGU possible.

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Today I Learned

• Fact/Description, possibly with an article reference
• Fact/Description
• Fact/Description

References