Research into circulation and respiration deals principally with the heart, blood vessels and lungs. It spans several important medical fields and diseases which impact significantly on both individuals and society.
Water is essential for life, but we don't need large quantities to keep us going – on the contrary, over-hydrating can be dangerous.
As few as one in ten survive a cardiac arrest outside of hospital. But a whole battery of studies is underway in the attempt to optimise all parts of the chain of survival.
Some people say that no one has ever died from a little dust. On the contrary, say others, dust is deadly. In reality, not all dust can be tarred with the same brush. Here is a guide to the dirt on earth – and on the moon.