I agree, whole-heartedly. A quote from William Thomson (aka Lord Kelvin): "When you can measure what you are speaking about, and express it in numbers, you know something about it, when you cannot express it in numbers, your knowledge is of a meager and unsatisfactory kind; it may be the beginning of knowledge, but…

I think the theory would go that the ones that left africa would have eventually migrated back to asia and then selectively removed their earlier ancestors there. A recirculation theory of human evolution which has been around for awhile. Of course, if DNA can be extracted from the teeth, then some chance of proving…

As a physicist, I won't believe any of this until there is DNA-tracing evidence. Hand-wavy arguments, such as saying one tooth is more primitive than another, is what allowed the first, and possibly false, conclusion to be drawn. Unless the method improves, one does not expect improved results. DNA tracking in…

Why trade from the outside when you can do it all from the inside?? Inside penetration, slam dunk!

I haven't watched the others in the Minute Physics series to be honest, but the concepts they are trying to explain are VERY complex. One can rely a lot on physical intuition in engineer (I have seen some Engineering Guy) but when it comes to theoretical mathematics and physics, the devil is in the details of complex…

Yea, the difference in currency is a bit of a red-herring. The key is the difference in value. I have provided what I interpret is what he's trying to say in another thread. Read if you're interested.

I agree with you wholeheartedly. I don't think he's trying to explain the measurement "problem" in quantum mechanics though. See my interpretation in my other post on the thread if you are interested.

PhD physicist in a field of experimental nuclear & particle physics here. I of all people should have some comprehension of the video. But upon first watching it, I really did not. So don't feel stupid at all. It was explained in a very complicated way. Guys at the Perimeter institute are "too far down the rabbit…

My intuition tells me that for take off, the plane can be placed at a precise orientation and position relative to the catapulting device. However, it's hard to land "on the dime" and so a hook and line system allows a much bigger tolerance for that.

I don't see how a video like this is not classified. Now the enemy not only knows the building time of these things, but can potentially disrupt the supply chain for just the next part to dramatically slow down the whole building process. Also, the interior is revealed in great detail: where the bunkers, engines,…

hmmm yea. a bit of an attention whore. teasing guys and all that. :-) but of course, one could assume the content was purely for females...

Really? I'm calling that they will add the mathematical square operator "²" , add 2.0, or just call it the "new OS X".

Can a technique like this really out compete membranes with pores so small that they can mechanically extract the salt? (if we're talking about desalination of water here and not the electricity generating mode.)

Interesting. The term "highly enriched uranium" usually implies isotopic enrichment. This effect does not occur here and thus is misleading. Only build-up ( or elemental enrichment, I suppose ) occurs here so the uranium would be close to natural abundance— not TOO exciting. :-)

I thought it looked pretty scary still; the bending angles of the fingers on the hand clawing the ground; the dirt and fingernails on the hand reaching out. It's done quite well!

It would be ironic if the car, which continued unmanned, ran over someone or some people. Perfect case study for a ethics philosophy class. Virtue ethics vs. Kant vs. Utilitarianism. What if the car ran over a group of children? Tragedy. If it ran over an old pensioner... net gain?

Oh. I thought the water looked bloody in there due to OTHER reasons! (Actually, I've never been to Baltimore but my best friend lives there. :D? )

Everything—not just metals—conduct heat to a certain extent. Just as they conduct electricity if the voltage is high enough to cause breakdown. Metals conduct better due to the extra free electron gas conductivity over standard phonon conductivity (highly technical). My point is different metals have different…

Either a simple mistake with autocorrect or a "try to be fancy with english" fail.

Great article. Will be passing it on to my non-particle physicist friends.