Virtual Issues

Friendly feeder or death trap? A conference of ornithologists next month will weigh up the myths and realities of feeding wild birds

It may never be loved by environmentalists, but the internal combustion engine could improve its reputation as polluter-in-chief – here’s how

The rebirth is almost complete – from our travel special

Proposals to resume commercial whaling have been dealt a blow by DNA detective work at US and South Korean sushi restaurants

The National Ignition Facility is over-optimistic in its aims for achieving laser fusion this year, says a government report

Stick-on solar cells about to flop off the production line could revolutionise the business of generating electricity from sunlight

It may never be loved by environmentalists, but the internal combustion engine could improve its reputation as polluter-in-chief – here’s how

Noctilucent clouds wax and wane over a period of 27 days, which suggests that their formation is partly controlled by the rotation of the sun

Volcanic rocks suggest the Earth’s magnetic poles may have tilted by 90 degrees over the past 600 million years

If you like sand and wildlife, forget the beach holiday – from our travel special