Hello and welcome to Unfiltered. My name is Oli Dugmore. My guest today is as close to a rock star

of theoretical physics as it's possible to be, who's credited LSD with sparking his interest in

the subject. He's also a philosopher of science, whose book Seven Brief Lessons on Physics was

translated into 41 languages, selling over a million copies worldwide. His work on the

quantum loop theory of gravity has seen him pick up where Einstein left off, and features in his

new book Whitehold. With prose so lyrical that he could have been a poet, if not a physicist,

his latest release journeys to where time and space end the heart of Blackhold. I guess today

is Karla Revelli. Karla, how are you? Thank you very much, Charlie, for this nice

Seven Lesson today. Was it okay? Yeah. Oh, it took too good, too good. Yeah, well, I'm glad to hear

it. Sometimes when you, I don't know, I've said this before, but you do an intro and then you kind

of, you start, you pick up on the body language of the person listening and sometimes you think,

oh my god, if I said something that defended them or whatever, I think there it was okay.

I think it was all right. Only a bit embarrassed. Okay, good, good. Maybe some more embarrassments

to come. How are you? What have you been up to in recent days and weeks? Wonderful, wonderful.

I mean, here in London, but came a few days ago from another London, London, Canada, London,

Ontario near Toronto. I'm slightly jet lagged with the groggy bits, everything's perfect.

Fortunately, we have some very light subject matter to talk about today. So I'm sure the jet lag

won't be a problem. I'd like to, before we get into kind of the subject matter of the book,

and you know, it is substantial and theoretical and incredibly important, there is also this question

that I'd like to delve into first though about the sort of the role of physics currently in mainstream

culture, because we've had this big film out right over the last couple weeks and months,

Oppenheimer, and sort of, yeah, theoretical physics, making it a big screen debut. Have you seen

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