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One of Britain's biggest technology success stories, Blinkx, saw its shares collapse by as much as 50 per cent yesterday after it was accused by a Harvard professor of "sneaking on to users' computers and defrauding advertisers".

Obituary: Dame Isabel Graham Bryce

It was for her work on the Oxford Regional Hospital Board (1963- 72) and also for her chairmanship of the National Nursing Staff Committee (1967-75) that Isabel Graham Bryce was, in 1968, appointed DBE. In her long working life, she set herself goals which were beyond mere personal ambition: she took an intense and genuine interest in the welfare of others, high and low, and she applied a systematic approach - derived, no doubt, from her early scientific training - to achieve what she saw as right and fitting.

How to gain balance

Companies are yearning for better ways to decide strategy. Roger Trapp treads the path to the wider perspective

Study links passive smoking with coronary problems

A ground-breaking study by researchers at Harvard University has found that regular exposure to second-hand tobacco smoke will almost double a person's risk of having a heart attack.

The big boys' blood money

An American company is selling the right to use stem cells - vital components in the fight against blood disorders. What's wrong with that? Plenty, say scientists who plan to block the enterprise. By Charles Arthur

The very latest way to have a baby by mistake

Long ago it was crocodile dung. Yesterday, it was the Pill. Today, Persona. Glenda Cooper on the quest for a perfect contraceptive

Student hanged herself before finals

A brilliant Oxford University student used a cord to hang herself just weeks before she was due to take her final exams, an inquest heard yesterday.

Letter: At risk of baffling everyone

One reason why experts and the public disagree about what is risky is that experts focus on objective measurables such as mortality rates while the public also give weight to what is novel, dreaded or seen as uncontrollable (Lewis Wolpert, Review, 6 April). Arguably, therefore, the public has a richer concept of risk. Am I irrational to fear what is new or horrible or out of control more than what is established, accepted and understood?

Gross natural products

Richard Davenport-Hines defines the yuck factor

Tiny machines will be able to build themselves

How do you build a micro-machine whose components are thousands of times smaller than a pinhead? The answer, according to American scientists, is that you don't - you let them build themselves.

Confessions of a company 'lifer'

THE MONDAY INTERVIEW Gordon Campbell : Head of Courtaulds talks to Tom Stevenson

How to be smarter with the same brain

Early intensive education can increase a child's IQ by 30 points, say proponents of accelerated learning. Maureen O'Connor reports

Not up to scratch

Liz Hodgkinson tried vitamins, creams and minerals on her problem nails. She finally found a remedy at the beauty salon

The day Elvis was all shook up

Stephen Brenkley tells the heartbreak of a cox for whom the perfect stage was set

Lizard puts man in the shade with ability to walk on water

Walking on water is scientifically possible, two American researchers have established, but only lizards can do it - and the lizards are really walking on air.

Jury still out on benefits of coffee

Women who drink coffee are less likely to commit suicide than those who do not, suggests a study published today. But the author says the results may not be significant, because doctors might have told depressed patients not to drink coffee, a factor that was not studied.
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Isis hostage crisis: The prisoner swap has only one purpose for the militants - recognition its Islamic State exists and that foreign nations acknowledge its power

Isis hostage crisis

The prisoner swap has only one purpose for the militants - recognition its Islamic State exists and that foreign nations acknowledge its power, says Robert Fisk
Missing salvage expert who found $50m of sunken treasure before disappearing, tracked down at last

The runaway buccaneers and the ship full of gold

Salvage expert Tommy Thompson found sunken treasure worth millions. Then he vanished... until now
Homeless Veterans appeal: ‘If you’re hard on the world you are hard on yourself’

Homeless Veterans appeal: ‘If you’re hard on the world you are hard on yourself’

Maverick artist Grayson Perry backs our campaign
Assisted Dying Bill: I want to be able to decide about my own death - I want to have control of my life

Assisted Dying Bill: 'I want control of my life'

This week the Assisted Dying Bill is debated in the Lords. Virginia Ironside, who has already made plans for her own self-deliverance, argues that it's time we allowed people a humane, compassionate death
Move over, kale - cabbage is the new rising star

Cabbage is king again

Sophie Morris banishes thoughts of soggy school dinners and turns over a new leaf
11 best winter skin treats

Give your moisturiser a helping hand: 11 best winter skin treats

Get an extra boost of nourishment from one of these hard-working products
Paul Scholes column: The more Jose Mourinho attempts to influence match officials, the more they are likely to ignore him

Paul Scholes column

The more Jose Mourinho attempts to influence match officials, the more they are likely to ignore him
Frank Warren column: No cigar, but pots of money: here come the Cubans

Frank Warren's Ringside

No cigar, but pots of money: here come the Cubans
Isis hostage crisis: Militant group stands strong as its numerous enemies fail to find a common plan to defeat it

Isis stands strong as its numerous enemies fail to find a common plan to defeat it

The jihadis are being squeezed militarily and economically, but there is no sign of an implosion, says Patrick Cockburn
Virtual reality thrusts viewers into the frontline of global events - and puts film-goers at the heart of the action

Virtual reality: Seeing is believing

Virtual reality thrusts viewers into the frontline of global events - and puts film-goers at the heart of the action
Homeless Veterans appeal: MP says Coalition ‘not doing enough’

Homeless Veterans appeal

MP says Coalition ‘not doing enough’ to help
Larry David, Steve Coogan and other comedians share stories of depression in new documentary

Comedians share stories of depression

The director of the new documentary, Kevin Pollak, tells Jessica Barrett how he got them to talk
Has The Archers lost the plot with it's spicy storylines?

Has The Archers lost the plot?

A growing number of listeners are voicing their discontent over the rural soap's spicy storylines; so loudly that even the BBC's director-general seems worried, says Simon Kelner
English Heritage adds 14 post-war office buildings to its protected lists

14 office buildings added to protected lists

Christopher Beanland explores the underrated appeal of these palaces of pen-pushing
Human skull discovery in Israel proves humans lived side-by-side with Neanderthals

Human skull discovery in Israel proves humans lived side-by-side with Neanderthals

Scientists unearthed the cranial fragments from Manot Cave in West Galilee