Man-made computers are limited in their performance by finite processing speed and memory. So, too, the cosmic computer is limited in power by its ag….

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….

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….

Although the elusive 'cure' may be a distant dream, understanding the true nature of cancer will enable it to be better controlled and less menacing..

Astonishingly, in spite of decades of research, there is no agreed theory of cancer, no explanation for why, inside almost all healthy cells, there l….

Searching for alternative life on Earth might seem misconceived, because there is excellent evidence that every kind of life so far studied evolved f….

If we do discover more than one type of life on Earth, we can be fairly certain that the universe is teeming with it, for it would be inconceivable t….

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….

Clearly, some creative thinking is badly needed if humans are to have a future beyond Earth. Returning to the Moon may be worthy and attainable, but ….

In time, [a Martian] colony would grow to the point of being self- sustaining. When this stage was reached, humanity would have a precious insurance ….

Cancer is such a ruthless adversary because it behaves as if it has its own fiendishly cunning agenda..

In 1911 the little town of Nakhla in Egypt was the scene of one of the most remarkable events in historym when a chunk of rock fell from the sky and ….

It's worth remembering that all technology leaves a footprint. For example, our own technology is leaving a footprint in terms of global warming, whi….

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….

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….

Science, we are repeatedly told, is the most reliable form of knowledge about the world because it is based on testable hypotheses. Religion, by cont….

So how can we test the idea that the transition from nonlife to life is simple enough to happen repeatedly? The most obvious and straightforward way ….

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….

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?".

Perhaps the best motivation for going to Mars is political. It is obvious that no single nation currently has either the will or the resources to do ….

We know that within the solar system is very unlikely there will be anything more advanced than microbial life, but if we think outside the solar sys….