Genes control which germs live in our gut. Long waits will always try patients Hospital waiting lists have an irreducible proportion of long delays. 12 JAN 2001 Science is all about networking Patterns of scientific collaboration shed light on the structure of society. A quantum computer can solve problems even without being switched on. A new scheme gives quantum-sealed secret messages a longer range.
Organic apples can be cheaper, tastier and better for the environment.
15 MAR 2001 Fall put leaves on trees Leaves may have evolved in response to a massive drop in the amount of carbon dioxide in the atmosphere. One-way 'smart' valves take a tip from nature.