Science Bytes - Episode 1

[TheHomelessCripple]

I like the quote at the end, it's one of my personal matras

[arachnophile01]

The daddy longlegs one was my favorite, because i have them in my backyard, and poke them all the time though I've never been bitten once. However they DO have greater reflexes than most spiders, and thus can kill a black widow before it realizes it SHOULD deploy it's poison, which is why they are awesome

[foreskinforest]

That was really interesting. I knew many of them, but thanks for clearing up the daddy long legs issue haha (horse fly) and the Goldfish's 5 second memory (I actually believed this was true). Great vid. A new sub.

[ProcInc]

the daddy long legs isn't a spider..

well, actually the daddy long legs is a colloquial term for two seperate kinds of arachnid

the Opiliones (or harvestman) is not a spider while the cellar spider (pholcidae) is. There is also an insect called the crane fly sometimes referred to as a daddy long legs

You probably knew this but could have mentioned

[nospacesallowed]

Interesting fact that probably has been pointed out to you... Poisonous refers to things eaten, Therefore of course Daddy Long Legs is not the most venomous or poisonous spider, But I think you mean venomous.

[stevebritgimp]

Nice to see the University of Plymouth getting a mention - some people don't think we even have a university.

[itsmaxinthebox]

Damn man, KingHeathen was right, you definitely deserved the Transitional Species award this month! Well done!

[TheInvaderBN]

I'm a little confused concerning the black hole statement.

I've heard many physicists and cosmologists describe a black hole as an object with such a strong pull of gravity that even light can't escape it.

Or were you talking about black holes with respect to our sun (if it collapsed)?

I don't get it...

[stevebritgimp]

Light can't escape from inside it - but things can still orbit around it - and radiation can come out of black holes - I think it's called Hawking Radiation and is a process where black holes might evaporate.

[RyuuKatsuro]

I actually already knew all of these (disappointing 'coz I was hoping I'd learn soemthing new - I like discovering something I "knew" is wrong). Do I get a cookie? Please?

[KingHeathen]

I was trying to catch the part about goldfish but...what was I saying?

Add on to the "Wise men" part...you never pointed out that they weren't even "wise men"...Magi simply refers to them being magicians. These magi were typically followers of astrology...hence the star they followed to find Jesus.

Great series! I watched them in reverse...looking forward to the next one.

[Dwicker64]

I was always told animals can only see things in black and white. If that is the case why are animals camouflaged to match there surroundings from predators and that should be in color?

[Maxdwolf]

I never heard the story about daddy long legs before. I had been handling harvestmen ever since I was a wee kid and never had a problem.

[caltrop69]

What most people refer to as a "Daddy Long Legs" in North America, isn't actually a spider, but another type of arachnid called a "harvestman." The spider you showed is also referred to as a daddy long legs. Neither possess much, if any, poison.

The easiest way to observe Coriolis is by draining a viscous fluid. The portion of a circle on the surface of a spinning globe that is closest to the equator has a higher angular velocity, causing a "spin." Toilets probably wouldn't work for this.

[diogenden]

Ask Penrose about the meaning of the word theory. And u'll understand it may not be tested in an experiment, but may already pass the hypothesis form at the same time.String Theory is a theory? Yes. Was it tested ? No. Do u feel me?

[EebstertheGreat]

diogenden, Penrose is using a more general definition of "theory" than Science Bytes. I must admit, I am bothered by many Youtubers elevating the term "theory" to indicate a status, whereas it is merely a field, but it is true that specifically in science, "theories" are generally only considered such if they have agree with the current consensus, and "models" otherwise.

But the main reason a theory differs from a hypothesis is that a theory contains MANY hypotheses in a general framework.

[michalchik]

I noticed that they change colors with their emotions. I always assumed that it was for camouflage when they were alone and for display when they were around other of their kind.

[CriticalAtheist]

Damn I didn't know 10. Back to the books.

[ModelAnarchist]

Good vid, but...

I think there are two species of daddy long legs... the harmless one we see around America, which is not even a true spider, and the extremly poisonous one which I believe is only found in Australia

[scaglietti03]

everything is extremely poisonous in australia...

[Dentarthurdent54]

I actually knew all of those beforehand! Do I get a prize?!

[ScienceBytes]

Yes, you win two Internets.

[Dentarthurdent54]

W00t!

[anubis2814]

Check out my video "Origin of Theories" For an explanation as to why Theory in lay terms came to mean "guess"

[jhohen03]

our sun at red giant level would reach earths orbit, not sure how long that would take but it will only reach around the size of our orbit

later, it will become a white dwarf, not a black hole

[scragar]

I knew that all 10 of those "facts" we incorrect before watching your video, I'm so awesome sometimes.

[ScrollWriter564]

SCIENCE is awesome!

[matthewj1985]

If our sun went supernova today would we not be engulfed in something like 11 minutes? Physics isn't my strong suit but I seem to remember seeing something about how even if our sun went "red giant" the earth and her orbit would quickly be taken over by the star itself. Then again I could be talking out my ass.

[sirnlawson]

Probably closer to an hour and a half. We're 8 light minutes away from the sun, and if the sun expanded into a supernova it would probably move at about 1/10 of the speed of light.

If it became a black hole it would have to become a ball about 3 kilometers across - but the sun doesn't have enough gravity to overcome the electrostatic repulsion that this would generate.

You need about 3 times as much mass as the sun has to make a black hole, and 8 times to make a supernova.

[sirnlawson]

Don't know how long it would take the Earth to be engulfed by a red giant expansion though - I don't know how quickly they expand.

[scaglietti03]

in like 20 to 50 years i believe

[finallyfreethinking]

On the long legs topic.... It is like you heard me say that to my son yesterday. Thanks for the enlightenment and keep up the good work!

[Finkeren]

Wikipedia claims that some species of chameleon, especially Smith's Dwarf Chameleon DOES use its color changing ability for camouflage, but that this propably evolved as a secondary use to its social function.

[Maxdwolf]

Yes, and there has been some research done showing that at least one South American (IIRC) species can adapt its camoflauge strategy according to the type of predator.

[Craigipedia]

you got yourself a SUB Science Bytes, awesome

[Finkeren]

Damn, for some reason I have never been corrected on the one about the Coriolis Effect, I still believed that one :-P

[Craigipedia]

@ #4

You are right about the blood not being "blue", but it is blue to us when viewed from outside the body. The sky isn't "blue" either, it is blue to human beings due to our evolved visual spectrum. It was a nice point, but you're splitting existential hairs. Since we can never be inside the vein to view blood first hand with our own eyes, all we know is that is it "blue" from the outside. An intravenous camera is not our eye, and cutting reveals the blood to the air, thus nullifying it

[EebstertheGreat]

YOU are the one who is absurdly splitting hairs! We know that venous blood does not substantially change upon exposure to air, since it is ALREADY oxygenated, thus we know by looking at the blood that it is red. I don't see how "revealing the blood to air" can in any way "nullify it."

But either way, color is merely the reflection or refraction of certain wavelengths of light, in which sense the sky IS indeed blue, although the gases it contains (mainly N2) are not, generally speaking, blue.

[DoctorE0]

Our importance is only in our minds..here today, gone tomorrow; Nobody would care. puff

[Loathomar]

"Contrary to popular belief, if our sun went super nova tomorrow not much would happen"?!?!? By that statement, it sound like the human race, all other life and the earth it's self would not be completely destroy if the sun where to super nova. Last time I check the destruction of the earth was considered "some happening". I am guessing what you mean to say was that as the mass of a start went supper nova and turned into a black hold the grav. of the BL would be = or > then the star.

[ScienceBytes]

In the grand scheme of the universe, humanity is "not much." None of the billions of stars and galaxies would care if our entire race was extinguished in the blink of an eye. In our eyes it would be a big deal but I meant on a grand scale in terms of the solar system. Most of the planets would continue in their usual orbit.

[outofnowheres]

plus , I heard that the credits( brain shutting down hallucination) is pretty epic!

[ChoofMonster]

Daddy long-legs are non-toxic to mammals, but they feast on larger and deadlier arachnids (in Australia, the redback and huntsman spiders).

[RevJerryFalwell]

In point 2 you say Jesus was actually a small child at the time of the alleged three wise men. I have yet to see any evidence he even existed at all, let alone claim it as scientific fact.

[DeBunx]

I've seen both of these videos now and even though I already knew most of these things, you did open my eyes to some that I did not know, (pending further investigation).

However, you said chameleons don't blend with their surroundings. I have seen a video of a chameleon walking slowly from one colored surface to another and not only does his color change to match each, but he could be half one color and half the other when standing on both.

That was a QED for me. Your thoughts?

[ScienceBytes]

Some species of chameleons will change color to match their background but they are not attempting to camouflage themselves, which is what most people believe. Perhaps my wording was a little strange, and for that I apologize.

[DeBunx]

Ah, but intent has little to do with selection.

Do you think this trait had some other advantage?

[ScienceBytes]

They communicate their emotions to other chameleons, as they are usually solitary creatures.

[johannb92]

I'm from Iceland, why'd you have to go ahead a put that image at 1:20 unless there was a typhoon here at some point in the history of the earth, I'm guessing around the time of one of the Ice ages but hey go ahead and educate me please!

[DeBunx]

What's your question? He's just explaining that cyclical storms are subject to the Coriolis effect, but water in your toilet is not.

It's analogous to tides. The moon causes nice, easily observable tides on a planetary scale, but virtually no effect on the water in your toilet.