The pinpoints of starlight we see with the naked eye are photons that have been streaming toward us for a few years or a few thousand.

There may be many Big Bangs that happened at various and far-flung locations, each creating its own swelling, spatial expanse, each creating a universe - our universe being the result of only one of those Big Bangs.

A unified theory would put us at the doorstep of a vast universe of things that we could finally explore with precision.

For me it's been very exciting to contribute to the public's understanding of how rich and wondrous science is.

If the theory turns out to be right, that will be tremendously thick and tasty icing on the cake.

There's a picture of my dorm room in the college yearbook as the most messy, most disgusting room on the Harvard campus, where I was an undergraduate.

I enjoy reading blogs, but am not interested in having my spurious thoughts out there.