Astronauts have been stuck in low-Earth orbit, boldly going nowhere. American attempts to kick-start a new phase of lunar exploration have stalled amid the realisation that NASA's budget is too small for the job.

When I was a student, the laws of physics were regarded as completely off limits. The job of the scientist, we were told, is to discover the laws and apply them, not inquire into their provenance.

No planet is more earth-like than Earth itself, so if life really does pop up readily in earth-like conditions, then surely it should have arisen many times right here on our home planet? And how do we know it didn't? The truth is, nobody has looked.

Should we find a second form of life right here on our doorstep, we could be confident that life is a truly cosmic phenomenon. If so, there may well be sentient beings somewhere in the galaxy wondering, as do we, if they are not alone in the universe.

I'm on a constant path of self-discovery and change. I'm trying to become a better person, a nicer person. I love therapy - it's brilliant.

The crisis triggered a fertile period of scientific ferment and revolution in economic theory.

I was an editor for supplemental math, science, and literature programs for the primary grades and became very well versed in elementary curriculum, particularly PreK-2.

There are few moments in science in which you genuinely are excited. The discovery of superfluidity in helium-3 was one of those moments.