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Although it might seem a fairly obvious observation, a new study from the University of Iowa has found not only that men, on average, have noses ten per cent larger than womens', they’ve also worked out why this might be.

When life as we know it became possible on Earth

The mystery of how our planet's atmosphere became rich in oxygen has finally been solved

Jeremy Laurance: The ultimate physical challenge

Most lay people know that Mount Everest is the highest in the world. What is less well known is that to reach the summit it is necessary to go up and down it about five times.

Steve Connor: A scientific dream for more than half a century

The ability to make unlimited quantities of red blood cells – which carry vital oxygen around the body – has been a dream of medical researchers for almost half a century. Now that dream is near to reality with developments in embryonic stem cell research.

Freediving: Sport taken to a new extreme

Competitors dive to 50m in freezing waters without oxygen

Mallory: The Everest enigma

Eight decades after his ill-fated expedition, the legend of George Mallory is about to live again – on screen and in a novel by Jeffrey Archer. So will we ever discover whether this dashing, sexually ambiguous, bohemian adventurer reached the top? Ed Douglas meets the myth-makers

Whitbread winner Christopher Nolan dies

Tributes pour in to Irish author who triumphed over disability

Change of air: how rising levels of oxygen transformed life on the land

The solution came from other forms of life that had emerged on land. A few small, worm-like creatures probably emerged from the sea at about the same time as the earliest plants and mosses, about 420 million years ago.

Ready to Wear: My first ever Eve Lom facial

Susannah Frankel: Oxygen facials are said to plump up the skin of both Kate Moss and Madonna

The doctor who dropped his trousers on top of the world

That's how Daniel Martin measured his blood oxygen level – and found a more effective treatment for his patients

Gas blast destroys flats in Ukraine

An explosion ripped through an apartment building in southern Ukraine, killing 19 people. A further 24 people are still unaccounted for, and officials expect the death toll to rise. Twenty-one residents were pulled out alive from the five-storey block in the Black Sea resort of Yevpatoria. The blast, probably caused by canisters of oxygen stored in the basement, flattened all five floors, leaving rubble several metres high strewn with wires, smashed furniture and personal possessions. "As I was walking by, I heard a bang, and then I saw this building crumble," one witness said. Another, who lived opposite the apartment block, said: "We heard a terrible bang. We thought our balcony crashed because of the way the windows vibrated. But when I went on to the balcony I saw smoke from the other side." President Viktor Yushchenko and the Prime Minister, Julia Tymoshenko, set aside their feuding to arrive at the scene together. Mr Yushchenko declared today a national day of mourning. Casualties caused by gas blasts in often crumbling apartment buildings are common occurrences in former Soviet republics, particularly in winter when residents use more heating. Reuters

Final words to her husband: 'Have a safe journey. I will see you some time'

Images of a terminally ill man ending his own life in a Swiss clinic are to be shown on British television for the first time tonight. The scenes were filmed with the patient's consent. His widow has praised the film for breaking the "taboo" that surrounds assisted suicide.

I feel 10 years younger, says father given first 'living lung' transplant

A patient has become the first in Britain to have a life-saving transplant using a technique that doctors hope will increase by 25 per cent the number of lungs available for transplant.

The History Man: The tale of Tom Bourdillon

Tom Bourdillon came within 300ft of immortality as the first man to climb Everest. Now fame beckons thanks to the breathing technology he pioneered, which could transform climbing and medicine, writes Andy McSmith

Simon Calder: Low pressure in the skies leads to high anxiety

Four out of five British travellers say they could walk alone and unaided to the North Pole with nothing more substantial than a chunky-knit jumper and a pocket full of Kendal mint cake. Even by the standards of some of the travel surveys that emerge during the dog days of August, that is tosh. But how about the statistic that was cited in the aftermath of a diverted Ryanair flight this week? "Well over 80 per cent of people on that flight knew they were going to die."

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Turkey-Kurdish conflict: Obama's deal with Ankara is a betrayal of Syrian Kurds and may not even weaken Isis

US betrayal of old ally brings limited reward

Since the accord, the Turks have only waged war on Kurds while no US bomber has used Incirlik airbase, says Patrick Cockburn
VIPs gather for opening of second Suez Canal - but doubts linger over security

'A gift from Egypt to the rest of the world'

VIPs gather for opening of second Suez Canal - but is it really needed?
Jeremy Corbyn dresses abysmally. That's a great thing because it's genuine

Jeremy Corbyn dresses abysmally. That's a great thing because it's genuine

Fashion editor, Alexander Fury, applauds a man who clearly has more important things on his mind
The male menopause and intimations of mortality

Aches, pains and an inkling of mortality

So the male menopause is real, they say, but what would the Victorians, 'old' at 30, think of that, asks DJ Taylor
Man Booker Prize 2015: Anna Smaill - How can I possibly be on the list with these writers I have idolised?

'How can I possibly be on the list with these writers I have idolised?'

Man Booker Prize nominee Anna Smaill on the rise of Kiwi lit
Bettany Hughes interview: The historian on how Socrates would have solved Greece's problems

Bettany Hughes interview

The historian on how Socrates would have solved Greece's problems
Art of the state: Pyongyang propaganda posters to be exhibited in China

Art of the state

Pyongyang propaganda posters to be exhibited in China
Mildreds and Vanilla Black have given vegetarian food a makeover in new cookbooks

Vegetarian food gets a makeover

Long-time vegetarian Holly Williams tries to recreate some of the inventive recipes in Mildreds and Vanilla Black's new cookbooks
The haunting of Shirley Jackson: Was the gothic author's life really as bleak as her fiction?

The haunting of Shirley Jackson

Was the gothic author's life really as bleak as her fiction?
Bill Granger recipes: Heading off on holiday? Try out our chef's seaside-inspired dishes...

Bill Granger's seaside-inspired recipes

These dishes are so easy to make, our chef is almost embarrassed to call them recipes
Ashes 2015: Tourists are limp, leaderless and distinctly UnAustralian

Tourists are limp, leaderless and distinctly UnAustralian

A woefully out-of-form Michael Clarke embodies his team's fragile Ashes campaign, says Michael Calvin
Blairites be warned, this could be the moment Labour turns into Syriza

Andrew Grice: Inside Westminster

Blairites be warned, this could be the moment Labour turns into Syriza
HMS Victory: The mystery of Britain's worst naval disaster is finally solved - 271 years later

The mystery of Britain's worst naval disaster is finally solved - 271 years later

Exclusive: David Keys reveals the research that finally explains why HMS Victory went down with the loss of 1,100 lives
Survivors of the Nagasaki atomic bomb attack: Japan must not abandon its post-war pacifism

'I saw people so injured you couldn't tell if they were dead or alive'

Nagasaki survivors on why Japan must not abandon its post-war pacifism
Jon Stewart: The voice of Democrats who felt Obama had failed to deliver on his 'Yes We Can' slogan, and the voter he tried hardest to keep onside

The voter Obama tried hardest to keep onside

Outgoing The Daily Show host, Jon Stewart, became the voice of Democrats who felt the President had failed to deliver on his ‘Yes We Can’ slogan. Tim Walker charts the ups and downs of their 10-year relationship on screen