Slow oxygenation of the atmosphere . Elastic turbulence . Venus is authentic . Potatoes for industry . Gentle endoscopy .
Dark matter distorts galaxies .
End of the enigma of the opal . A massive new extinction is in the works. The various contradictory theories only partially explain the variety of region's plant groupings. At the same time, men have lived and farmed in the Amazon. Up until the European conquest, these men played a crucial role in the maintenance, expansion and diversity of the forest.