National

We tend to think of space as a fundamental part of reality's architecture: it's where everything is located. But that reflects an outdated, classical intuition.

New view: These days we know that quantum mechanics provides a more accurate view of the world. According to quantum theory, the world isn't actually made of "objects" with "locations" in three-dimensional "space." Those are simply convenient ways of talking about features of an abstract and more fundamental description of the universe: the wave function. It evolves in a mathematical realm with more than 10^(10^100) dimensions. That's an absurdly large number, which should just make you think "Wow, that's a lot of dimensions."

In this view, ordinary space is like "temperature" or "wetness" – not a fundamental category, but a useful approximation we invoke to describe a tiny sliver of reality.

Bottom line: Physics has a long way to go before we understand how space emerges from quantum mechanics, but we shouldn't be surprised that the fundamental nature of stuff is something very different from what we're used to.

Izabella Laba, mathematician, University of British Columbia: We can work with space without understanding its essence

Bridget Falck, astrophysicist, University of Oslo: Space is a relation between things, not a thing itself

David Albert, philosopher, Columbia University: Maybe there is no space

Space is overrated

Science

Expert Voices

O<a class="gtmContentClick" data-vars-link-text="ur Expert Voices conversation on space." data-vars-click-url="http://rbl.ms/2sq4N00" data-vars-content-id="d8033448-cdb6-4cf6-abea-ef1e7b53eb1c" data-vars-headline="Space is overrated" data-vars-event-category="story" data-vars-sub-category="story" data-vars-item="in_content_link" href="http://rbl.ms/2sq4N00" target="_blank">ur Expert Voices conversation on space.</a>We tend to think of space as a fundamental part of reality&#x27;s architecture: it&#x27;s where everything is located. But that reflects an outdated, classical intuition.New view: These days we know that quantum mechanics provides a more accurate view of the world. According to quantum theory, the world isn&#x27;t actually made of &quot;objects&quot; with &quot;locations&quot; in three-dimensional &quot;space.&quot; Those are simply convenient ways of talking about features of an abstract and more fundamental description of the universe: the wave function. It evolves in a mathematical realm with more than 10^(10^100) dimensions. That&#x27;s an absurdly large number, which should just make you think &quot;Wow, that&#x27;s a lot of dimensions.&quot;In this view, ordinary space is like &quot;temperature&quot; or &quot;wetness&quot; – not a fundamental category, but a useful approximation we invoke to describe a tiny sliver of reality.Bottom line: Physics has a long way to go before we understand how space emerges from quantum mechanics, but we shouldn&#x27;t be surprised that the fundamental nature of stuff is something very different from what we&#x27;re used to.Other voices in the conversation:<ul><li>Izabella Laba, mathematician, University of British Columbia: <a class="gtmContentClick" data-vars-link-text="We can work with space without understanding its essence" data-vars-click-url="http://rbl.ms/2sxQ6Io" data-vars-content-id="d8033448-cdb6-4cf6-abea-ef1e7b53eb1c" data-vars-headline="Space is overrated" data-vars-event-category="story" data-vars-sub-category="story" data-vars-item="in_content_link" href="http://rbl.ms/2sxQ6Io" target="_blank">We can work with space without understanding its essence</a></li><li>Bridget Falck, astrophysicist, University of Oslo: <a class="gtmContentClick" data-vars-link-text="Space is a relation between things, not a thing itself" data-vars-click-url="http://rbl.ms/2spUHMF" data-vars-content-id="d8033448-cdb6-4cf6-abea-ef1e7b53eb1c" data-vars-headline="Space is overrated" data-vars-event-category="story" data-vars-sub-category="story" data-vars-item="in_content_link" href="http://rbl.ms/2spUHMF" target="_blank">Space is a relation between things, not a thing itself</a></li><li>David Albert, philosopher, Columbia University: <a class="gtmContentClick" data-vars-link-text="Maybe there is no space" data-vars-click-url="http://rbl.ms/2t2QJNt" data-vars-content-id="d8033448-cdb6-4cf6-abea-ef1e7b53eb1c" data-vars-headline="Space is overrated" data-vars-event-category="story" data-vars-sub-category="story" data-vars-item="in_content_link" href="http://rbl.ms/2t2QJNt" target="_blank">Maybe there is no space</a></li></ul>

A look at the scientific breakthroughs changing the world, explorations in space and in worlds beyond our own and the threats posed to us by our own planet, both out of our control and of our own making.

Sean Carroll (theoretical physicist)

Stories

Space is overrated