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Analysis and Comment (4)

Bigger inside, says science. Bigger inside, says science. Ian West/PA

Might some of Doctor Who actually be possible?

As Doctor Who’s 50th anniversary looms, time travel is everywhere – on the screen, at least. Famously, the Doctor can whizz through the years using a “dimensionally transcendental” machine, the TARDIS…
We’ve got the time, if you’ve got the theory. We’ve got the time, if you’ve got the theory. h.koppdelaney/Flickr

Explainer: the fifth dimension

By now we’re used to the idea that the world has four dimensions: three spatial and one temporal. But what if there were a fifth dimension – what would that dimension look like, and how would it relate…
Is our understanding of time a “stubbornly persistent illusion”? Is our understanding of time a “stubbornly persistent illusion”? xenob/Flickr

Time is but a dream … or is it?

One thing most of us know about time is that there isn’t enough of the stuff, and that the problem is getting worse. “Too swiftly now the Hours take flight,” as the English poet Austin Dobson (1840-1921…
Time travel has long been a staple of science fiction but the LHC might make it a reality. Time travel has long been a staple of science fiction but the LHC might make it a reality. Fabrice Coffrini/AFP

Is the Large Hadron Collider a time machine?

Switzerland’s Large Hadron Collider (LHC) can be called a time machine in one sense: it enables us to examine conditions as they were during the universe’s early stages. But is the 27km-long particle accelerator…