I'm interested in helping secure the PC - we need innovation here. It's not just hug your PC, hate the iPhone. In fact I don't even hate the iPhone; I think it's really cool. I just don't want it to be the center of the ecosystem along with the Web 2.0 apps.

The last refuge of privacy cannot be placed solely in law or technology. It must repose in both, and a thoughtful combination of the two can help us thread a path between having all our secrets trivially discoverable and preserving nothing for our later selves for fear of that discovery.

Attacks on Internet sites and infrastructure, and the compromise of secure information, pose a particularly tricky problem because it is usually impossible to trace an attack back to its instigator.

I don't know how much thought is behind it, but it seems to me highly effective the way that Facebook will let somebody tag a photo with a friend's name, then others who are a friend of that friend can perhaps immediately see the photo, and the friend, in the meantime, has a chance to wander back and un-tag it.

Gravity is one variable in a lot of scientific processes. If you can remove gravity or minimize its effect, then you can understand the other processes that are going on.

This being so, it follows that mythology ought not to take the prominent place that is too often assigned to it in the scientific study of ancient faiths.

In science, 'fact' can only mean 'confirmed to such a degree that it would be perverse to withhold provisional assent.' I suppose that apples might start to rise tomorrow, but the possibility does not merit equal time in physics classrooms.

People are fascinated by space flight. It makes them interested in science, gets them asking questions and motivates them.