Art McDonald Public Lecture: A Deeper Understanding of the Universe from 2 km Underground 

A wonderful scientist ,with exceptional humility, and a brilliant sense of humour. Thank you to all concerned for this talk.

Isn't science just wonderful?!? Seeing a 72 year old that is so passionate and engaged in a subject truly exemplifies the positive impact science has on those who do it. It is the greatest of human endeavors.

A brilliant scientist with a wonderful sense of humor & an extraordinary range of humility.🤯

Should have 1,000,000 views! Thanks pi!

Dr. McDonald had instantly become my favorite speaker. Grateful for this video.

34;20 - The bit about lab cleanliness and Dr. McDonald's mother - that was really cute. I hope my mom is still around when I'm his age.

Thanks PI for sharing these talks.

Thanks RU-vid and PI for sharing these extraordinary events. It is a valid privilege to experience a lecture of this quality by a veritable Nobel Prize winner. Who formerly was able to be part of this?

Cool lecture...complicated stuff presented well, with a little humor thrown in

what are some of the practical applications or technologies developed from these experiments?

6:45 is the end of the intro's

great speaker, steller all around! very nice camera work, sound, and editing.

Do we know enoughabout gravity so that DM has to be postulated? I mean the behaviour of stars in the galaxies why should be the same of planets orbiting our sun when these two systems are so much different?

Great Talk. Thank you for the upload.

1:08:00 - Love that young man! Look at him go! How very cool!

Really splendid, Thankyou

I love that intro! I am a Physics major / Computing & Software Systems minor in Washington State and I would looove to come visit Perimeter Institute. I look forward to these lectures. Thank you!

"It looks clean dear." -his Mom. LOL "Yellow submarine" LOL

Thank you Pop! And Gratitude and Honor for ATTENDING UNTO OUR OWN! LOVE YOU TOO! Remembering ye once born, to crawling, to walking, and till now thy feet resting upon the NEW very tip of time. Thy Heirs and our Beautiful Scientists will say, "MILEAGE FROM THY FEET IS RECOGNIZE"! Pop at least I can do is to washed thy FEET to be given New Feet. To let ye know? Thy Little Child "i" AM. Who love with patience, mercy and grace. That i LOVE THEE! Gratitude and Honor unto thee! Likewise Gratitude and Honor knows belongs?

So few views for such an interesting and informative lecture.

Amazing experiment

자막이 없는 게 아쉽네요. ^^;

I love PI!

Amazing story!

Even kids ask good questions, as shown here. They actually have heard of atoms before . You do not need to "dumb it down." That's from an ignorant administrators perspective. Also, retrain soap opera camera people to dwell on chalkboards of ignored equations, not facial shots. This is a systematic flaw across all on line lectures, or an aspect of excluding segments of the population from getting the most out of the otherwise fabulous lectures. Otherwise what is the point of museum style ignored chalkboards of equations? People in the auditorium get to gaze at these equations, not on line viewers. All they get is incessant streams of facial shots eclipsing the wallpaper of museum style ignored equations. This is what needs to be dumbed down, the lack of camera training!

Why not design and construct the detector to be submerged a few hundred meters in the ocean instead of a terrestrial mine? I'd think you could shield from radioactive decay more easily and the bouancy of seawater could help support the entire device.

Is that a kodakan badge on his lapel?

I believe that it will be eventually shown that neutrinos are composed of two photons that are intimately twisted around each other as they travel through spacetime. The net speed is slightly less than c because of the increased relative distance they cover from the twisting motion. One of its component photons leads with a positive charge and the other leads with a negative charge. Neutrinos will be found to be a Majorana particle. But they will not annihilate each other because they are composed of E1 energy. Annihilation results when a particle and its antimatter particle both containing E2 energy converts their E2 energy to E1 energy. Since neutrinos are already E1 energy, they will not annihilate each other.

Good

thankyou for say labratory, instead of la bor a tory

totally wrong about Albert and his constant, where does this stuff come from? not reality. not from Albert's publications. he put that in there to balance the equation but he did not like it because he did not have a physical explain for it, and you know what, we still don't

Like it

Quiero ver comentarios en español😂😂

i'm astonished by the lack of understanding here, these guys belong on the back of a text book

I find it amazing how the community of scientific process has allowed an idea that explains nothing but the speed of light whith no idea of to where it started. While knowing full well that the speed of light had already been explained with the nicest e=mc2 you can ever find in the whole universe. What is particularly ugly in this case, is the fact that here was a chance to move from empire type of thinking philosophy of ( I am therefore I think, or I think therefore I must be clever, or was it, I think therefore I must be ) to real science, that of e=mc2. But everyone chose to go with " I think therefore I must be clever." Which knowingly very bad, unknowingly very dangerous is the exact reason of why one would come up with the primordial atom idea/theory (big bang) straight after e=mc2. An Atom has a form/mass, without light it is formless/without mass. By the way I am writing not much in relation to the videos. The videos and the teachers are amazing, may they be multiplied, this way we get moving a bit.

"They are asking me to dumb it down a little bit" lolol

Sip.

Not to be sold for people over the age of 23 :)

How does this knowledge feed the poor, heal the sick etc etc

WE HAVE 100% PROOF !!! @

#deuteriumSoda here, we are cure for your problems. just legalize nukes for recreational purposes, I want to try someting...

A joke every 40 seconds is in itself a joke

en.wikipedia.org/wiki/Weakly_interacting_massive_particle