The Mississippi River Delta, where the largest river in the United States empties into the Gulf of Mexico. In this false-colour image, land vegetation appears pink, while the sediment in the surrounding waters are bright blue and green
Scenes of beauty: Tendrils of water snake their way through raised hills and sunken valleys. 'Only from above do you begin to see certain colors, influenced by the angle and the sunlight,' Gawenda says
The micro-structure of a scale from a butterfly wing. The holes are around 1 micrometre across, about the size of a bacterium. Visualised using scanning electron microscopy by Dr Bronwen Cribb, University of Queensland.