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Though not ruled out by general relativity, travelling into the past would seem to violate common-sense notions of causality and free will — and then there's the Grandfather Paradox… Part …

Time travel has been a favorite subject for science fiction writers, but what does science have to say about it? In Part One of my two-part video, I look at …

My review of "Hello Hi There," Annie Dorsen's provocative stage production, in which computers do the talking. From New Scientist's Culture Lab blog.

What is the Higgs boson, and why does it matter that we've found it? My interview with physicist Robert Orr, from today's Globe and Mail.

My report from the largest-ever Turing test marathon, held at Bletchley Park, England, in connection with the Alan Turing Centenary. The computers are getting smarter!

My latest video is a light-hearted look at the phenomenon of "MIT-henge," the twice-a-year alignment in which the setting sun lines up with the "infinite corridor" at the Massachusetts Institute …

Physicist Adam Frank calls it the "braiding" of cosmology and culture: I review his book About Time in the current issue of Physics World.

In my latest post for the MIT SciWrite blog, I speculate on the path that led to language-using homo sapiens here on Earth – and what it might mean for …

In my first post for the MITSciWrite blog, I look at the chances of having a universe like the one we live in: What were the odds? And in my …

My travel article on Easter Island appears in today’s Los Angeles Times. Known for its ancient stone statues, or moai, the remote island remains a place of exquisite solitude. (I …