Today it represents something quite different: a set of extraordinary clues, recently reinterpreted, to one of the deepest and most puzzling mysteries of life on Earth. After burbling along for ...

From 4.6 billion years ago when the Earth was red hot, the timeline illustrates the evolution of the first life forms through to plants photosynthesising, bacterial evolution, marine life ...

These are pictures from ... Brian Cox explains the first law of thermodynamics. He describes how energy is always conserved, never created or destroyed. How has life on Earth become so varied?