This podcast from the Planet Earth Online collection and the Natural Environment Research Council (NERC) looks at how the eruption of the Eyjafjallajökull volcano in Iceland gave scientists an unparalleled opportunity for research, and why sediment from rivers like the Thames can act like time machines to bygone...

This podcast from the Planet Earth Online collection and the Natural Environment Research Council (NERC) looks at why weathermen are using a converted World War II bunker to monitor clouds; how thug species such as bramble, nettle and bracken can be just as damaging to woodlands as alien plants; and why scientists...

This podcast from the Natural Environment Research Council's (NERC) Planet Earth Online collection looks at how scientists are using fish scales to figure out why the UK salmon population is falling; and how carbon dioxide emissions from power stations could be used to make household bricks.

Salmon numbers...