Living systems are characterised not just by vast complexity but also by irreducibly complexity. This characterises all the diverse functions of living things. The individual parts of each system are useless on their own, suggesting that all parts must have appeared simultaneously if they were to persist as an inherited characteristic.

All the main functions of life - reproduction, digestion, respiration, locomotion, sensation, excretion - share this common characteristic - that the whole is always greater than the sum of the parts - the whole structure serves a function and purpose that is not found in any one of the parts.

In fact the whole is so integrated that it becomes useless and harmful if a part is missing.

And the really remarkable thing is that these highly complex systems embody information - a programming code - the genetic code of life.

The question is - where did this information come from?