Janna Levin

A weird neighbor, yeah.

A weird neighbor, yeah.

A weird neighbor, yeah.

It's like a watershed moment. Yeah.

It's like a watershed moment. Yeah.

It's like a watershed moment. Yeah.

Well, this, it was obvious to no one that space-time was curved, but even Newton understood something wasn't right. So he knew there was something missing. And I think that's always fascinating when we're in... a situation where we're pressure testing our own ideas.

Well, this, it was obvious to no one that space-time was curved, but even Newton understood something wasn't right. So he knew there was something missing. And I think that's always fascinating when we're in... a situation where we're pressure testing our own ideas.

Well, this, it was obvious to no one that space-time was curved, but even Newton understood something wasn't right. So he knew there was something missing. And I think that's always fascinating when we're in... a situation where we're pressure testing our own ideas.

He did something remarkable, Newton did with his theory of gravity, just understanding that the same phenomenon was at work with the earth around the sun as the apple falling from the tree. That's insane. That's a huge leap. Understanding that mass, inertial mass, what makes something hard to push around, is the same thing that feels gravity, at least in the Newtonian picture, in that simple way.

He did something remarkable, Newton did with his theory of gravity, just understanding that the same phenomenon was at work with the earth around the sun as the apple falling from the tree. That's insane. That's a huge leap. Understanding that mass, inertial mass, what makes something hard to push around, is the same thing that feels gravity, at least in the Newtonian picture, in that simple way.

He did something remarkable, Newton did with his theory of gravity, just understanding that the same phenomenon was at work with the earth around the sun as the apple falling from the tree. That's insane. That's a huge leap. Understanding that mass, inertial mass, what makes something hard to push around, is the same thing that feels gravity, at least in the Newtonian picture, in that simple way.

Unbelievable leap. Absolutely genius. But he didn't like that the apple fell from the tree, even though the Earth wasn't touching it.

Unbelievable leap. Absolutely genius. But he didn't like that the apple fell from the tree, even though the Earth wasn't touching it.

Unbelievable leap. Absolutely genius. But he didn't like that the apple fell from the tree, even though the Earth wasn't touching it.

The action at a distance.

The action at a distance.

The action at a distance.

It's really weird. But see, Einstein solves that. Relativity solves that. Because it says the Earth created the curve in space. The apple wants to fall freely along it. The problem is the tree's in the way. The tree's the problem. The tree's actually accelerating the apple. It's keeping it away from its natural state of weightlessness in a gravitational field.

It's really weird. But see, Einstein solves that. Relativity solves that. Because it says the Earth created the curve in space. The apple wants to fall freely along it. The problem is the tree's in the way. The tree's the problem. The tree's actually accelerating the apple. It's keeping it away from its natural state of weightlessness in a gravitational field.