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."

Latest stories from i100
Career Services

Day In a Page

Independent Travel
Pompeii, Capri & the Bay of Naples
Seven Cities of Italy
Burgundy, the River Rhone & Provence
Prague, Budapest and Vienna
Lake Garda
Minoan Crete and Santorini
Prices correct as of 1 May 2015
Fishing for votes with Nigel Farage: The Ukip leader shows how he can work an audience as he casts his line to the disaffected of Grimsby

Fishing is on Nigel Farage's mind

Ukip leader casts a line to the disaffected
Who is bombing whom in the Middle East? It's amazing they don't all hit each other

Who is bombing whom in the Middle East?

Robert Fisk untangles the countries and factions
China's influence on fashion: At the top of the game both creatively and commercially

China's influence on fashion

At the top of the game both creatively and commercially
Lord O’Donnell: Former cabinet secretary on the election and life away from the levers of power

The man known as GOD has a reputation for getting the job done

Lord O'Donnell's three principles of rule
Rainbow shades: It's all bright on the night

Rainbow shades

It's all bright on the night
'It was first time I had ever tasted chocolate. I kept a piece, and when Amsterdam was liberated, I gave it to the first Allied soldier I saw'

Bread from heaven

Dutch survivors thank RAF for World War II drop that saved millions
Britain will be 'run for the wealthy and powerful' if Tories retain power - Labour

How 'the Axe' helped Labour

UK will be 'run for the wealthy and powerful' if Tories retain power
Rare and exclusive video shows the horrific price paid by activists for challenging the rule of jihadist extremists in Syria

The price to be paid for challenging the rule of extremists

A revolution now 'consuming its own children'
Welcome to the world of Megagames

Welcome to the world of Megagames

300 players take part in Watch the Skies! board game in London
'Nymphomaniac' actress reveals what it was really like to star in one of the most explicit films ever

Charlotte Gainsbourg on 'Nymphomaniac'

Starring in one of the most explicit films ever
Robert Fisk in Abu Dhabi: The Emirates' out-of-sight migrant workers helping to build the dream projects of its rulers

Robert Fisk in Abu Dhabi

The Emirates' out-of-sight migrant workers helping to build the dream projects of its rulers
Vince Cable interview: Charging fees for employment tribunals was 'a very bad move'

Vince Cable exclusive interview

Charging fees for employment tribunals was 'a very bad move'
Iwan Rheon interview: Game of Thrones star returns to his Welsh roots to record debut album

Iwan Rheon is returning to his Welsh roots

Rheon is best known for his role as the Bastard of Bolton. It's gruelling playing a sadistic torturer, he tells Craig McLean, but it hasn't stopped him recording an album of Welsh psychedelia
Morne Hardenberg interview: Cameraman for BBC's upcoming show Shark on filming the ocean's most dangerous predator

It's time for my close-up

Meet the man who films great whites for a living
Increasing numbers of homeless people in America keep their mobile phones on the streets

Homeless people keep mobile phones

A homeless person with a smartphone is a common sight in the US. And that's creating a network where the 'hobo' community can share information - and fight stigma - like never before