Testosterone's reputation largely undeserved

Far from increasing violence and greed, the male hormone can encourage decency and fair play, scientists have found

Boom in bird tables has changed evolution

Scientists in Germany believe some birds may have changed their migration habits because of an increase in feeding tables

Wonderful world: the great survivors

They have soldiered on through meteor showers and volcanic eruptions, but climate change could see off these species

Top climate scientist hopes summit will fail

'Grandfather' of global warming James Hansen plans to boycott Copenhagen climate conference, denouncing it as a farce

Palm oil is the new economic barometer

The ‘green gold’ industry is destructive but developing Asian countries want the same benefits as those enjoyed by the West

Climate change ‘making polar bears cannibals’

Inuit leaders have dismissed the idea, saying that it is a normal occurrence totally unconnected with global warming

A 'step change' is needed to limit UK emissions

The Committee on Climate Change recommends charging us to drive, three new nuclear power stations and 8,000 wind turbines

Met Office to re-examine 160 years of climate data

Body takes step after admitting public confidence in global warming has been shattered by leaked e-mail scandal

Scientists find single ‘on-off’ gender gene

Research that caused adult female mice to develop testes and produce testosterone could revolutionise reassignment therapy

Science rescues children from obesity police

Research undertaken by Cambridge University suggests that the problem lies in the children’s chromosomes, not overfeeding

Genes wage arms race in battle of sexes

Scientists believe the male genome does not 'trust' the female genome to make an adequate placenta, so imprints its genes

Having two mothers may be key to a longer life

Japanese research which could have implications for human ageing suggests fathers’ genes reduce lifespan

Testosterone's reputation largely undeserved

Far from increasing violence and greed, the male hormone can encourage decency and fair play, scientists have found

Schwarzenegger talks dirty

The Governor of California’s rude riposte to the state assembly was random ... surely

Wonderful world: the great survivors

They have soldiered on through meteor showers and volcanic eruptions, but climate change could see off these species

So what if green is not the new black?

The green lifestyle was all the rage not so long ago. Now, just when we all need to adopt it, it's out of fashion

Patients 'missing out on simple cancer test'

The introduction of powerful therapies is being held up by poor access to critical genetic tests, Sir John Bell claims

Sisters lose stomachs to beat family risk

Meeta and Ravindra Singh are both expected to lead almost normal lives, but can eat only small amounts of food at a time

Scientists urge reform of ‘lethal’ libel law

Suppression of vital medical debate by fear of being sued in English courts could result in loss of life, experts say

Research throws up doubts over Tamiflu

There is no clear evidence that Tamiflu prevents complications in people with flu, new research suggests

The Eureka Quiz

Three levels of difficulty and - most importantly - the answers

CERN 'a threat' to nuclear energy research

Physicists fear that costs of Hadron Collider experiments could leave programme for new power stations in disarray

Huge experiment to look at elusive neutrinos

A scientific project in Japan is investigating a fundamental particle called the neutrino, about which much is unknown

Hadron Collider makes first particle collisions

The 'big bang' machine smashed its first proton beams together, three days after a 14-month shutdown for repairs

Britain 'can’t back' Obama's pullout pledge

Rift with US exposed as Defence Secretary says setting date for withdrawal of British troops from Afghanistan impossible

Doctor to argue freedom of speech defence

A heart doctor being sued for criticising a US company’s research says scientists must be free to challenge such work

Johnson accused as three more scientists quit

Home Secretary accused of 'political expediency' in his use of scientific advice as fallout grows from sacking of adviser

Advisers have a right to speak plainly

Ministers must think twice before commissioning opinions they have no intention of heeding and then shooting the messenger

Telescope that could show the sky is crowded

Nasa’s Wide-field Infrared Survey Explorer will reveal stars that were invisible because they are too cool to emit visible light

Sexy science: shedding light on dark matter

It’s what most of the universe is made of — so why is it so hard to see?

Captured on film: hottest star in the Galaxy

Refurbished Hubble telescope detects dying star 3,500 light years from Earth that has never been seen before

Astronauts home after six months on space station

After 188 days in zero-gravity, a Russian, Belgium and Canadian touched down in Kazakhstan ending an epic journey