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.

Once you start to look into the guts of climate change you find that just about every scientific institution in the world is conducting research on the issue.

Wal-Mart doesn't really care about your faith. Wal-Mart cares if you have money to spend, and it is going to be as generic as possible in exploiting the holiday season for every buck it can make.

In research, I wanted to establish the medicinal chemistry/bioassay conjugation as an academic pursuit, as exciting to the imagination as astrophysics or molecular biology.

The philosophical spirit is not satisfied to simply accept what it is told, no matter how much prestige the teller seems to have. This is true even if the teller is a god.