Is anybody listening out there?

Messages are beamed to a planet 20 light years from Earth in the hope they will reach intelligent alien life.

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Fisheries waste 'costs billions'

The world's fishing fleets are losing billions of dollars each year through depleted stocks and poor management, a UN report says.

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Hydrogen centre 'first in the UK'

A hydrogen energy research centre, described as the first of its kind in the UK, opens near Swansea, Wales.

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Pledge to protect Sumatran forest

Indonesia pledges to stop the loss of forests and species in Sumatra, one of the world's most ecologically important islands.

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In bloom

A Dutch company cultivates algae for use in biofuel

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Call to maintain climate targets

Ed Miliband, the new energy and climate secretary, urges Europe's leaders to stick to climate change targets.

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World's loneliest bug may offer clues to life on other planets

A bug which lives entirely on its own without oxygen and in complete darkness could offer clues to life on other planets.

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Minister wants astronaut 'icon'

The UK's new science minister says he wants a British astronaut in space because that individual would inspire youngsters.

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Susan Watts blog

The companies offering algae as a universal cure-all

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'Unbreakable' encryption unveiled

A computer network protected by unbreakable quantum encryption is launched at a science conference in Vienna.

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Europe follows fusion twin track

An alternative fusion project is initiated in Europe that would seek abundant clean energy using a colossal laser.

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Economic problems must not derail the Millennium Development Goals

Why economic problems must not derail progress on the Millennium Development Goals, which the UN assesses this week.

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Lions and cheetahs prove to be a big hit on the BBC's webcams

Webcams in Kenya's Masai Mara Reserve have proven to be a big hit with users during the BBC's Big Cat Live event.

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The Tech Lab

Steve Furber - from the BBC Micro to the human brain

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Gut 'tasting' could beat poisons

The gut may have receptors that shut down appetite when bitter substances are detected, a study suggests.

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Silver lining

Why climate change is good news for conservationists

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Nature loss 'dwarfs bank crisis'

The global economy loses more money from deforestation than the current banking crisis, says an EU-commissioned report.

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The plight of the bluefin

The Atlantic bluefin tuna is in a parlous state - does it represent a oceans-wide legacy of overfishing?

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US space tourist set for launch

US space tourist Richard Garriott will follow in the footsteps of his astronaut father when he blasts off into space on Sunday.

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Nasa committed to Mars rover plan

Nasa pushes ahead with plans to launch its 2009 Mars mission, but acknowledges the need for extra funds to make it happen.

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'Glowing' jellyfish grabs Nobel

A clever trick borrowed from jellyfish earns two Americans and one Japanese scientist a share of the chemistry Nobel Prize.

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Monkey or lion?

Clever marketing gives hybrid seeds farmer appeal

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Messenger extends Mercury vista

Nasa's Messenger probe returns more close-up images of Mercury previously unseen by a spacecraft.

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Rich ecosystem

The skills which you might need to save the planet

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Cosmic imperfections celebrated

The Nobel Prize for physics this year lauds three individuals who described tiny flaws in the fabric of the Universe.

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