Most life on Earth is microbes. we've only just scratched the surface of the microbial realm. Probably less than .1% of microbes have been classified….

Astronauts have been stuck in low-Earth orbit, boldly going nowhere. American attempts to kick-start a new phase of lunar exploration have stalled am….

I always look on the black side of life. That way, you won't be disappointed and I'm cheerful if it doesn't work out. I'm a cheerful pessimist..

The problem here is that a civilization that is 1,000 light years away doesn't know we exist. They don't know that we have radio telescopes here on E….

It's always good in science to say "Well how do you know that?" and "Are you really sure?" and "Could there be an exceptional case?".

General relativity is the cornerstone of cosmology and astrophysics. It has also provided the conceptual basis for string theory and other attempts t….

Imagine a civilisation that's way in advance of us wants to communicate with us, and assist us in our development. The information we provide to them….

The Universe is not a collection of objects, but is an inseparable web of vibrating energy patterns in which no one component has reality independent….

The Goldilocks Enigma is the idea that everything in the universe is just right for life, like the porridge in the fairy tale..

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….

We could tell them [alien civilization] things that we have discovered in the realm of mathematical physics, but there is stuff that I would like to ….

The question not many ask is: why are the laws of physics like they are?.

To a physicist life looks nothing short of a miracle. It's just amazing what living things can do..

Very, very slowly, the dwarf remnants of what was once our mighty sun will cool and dim, until it embarks on its final metamorphosis, gradually solid….

Technology is, in the broadest sense, mind or intelligence or purpose blending with nature..

If we're looking for intelligence in the universe I think everybody assumes that this has to start with life and so the question is: "How likely is i….

"Are we alone in the universe?" This is a question which goes back to the dawn of history, but for most of human history it has been in the province ….

A permanent base on Mars would have a number of advantages beyond being a bonanza for planetary science and geology. If, as some evidence suggests, e….

It may seem bizarre, but in my opinion science offers a surer path to God than religion..

It is hard to resist the impression that the present structure of the universe, apparently so sensitive to minor alterations in numbers, has been rat….

Cancer is like another form of life. It's closely related to healthy life. A healthy body is one form of life. Cancer is in a way nature's experiment….