Supporters of toppled President Mohamed Morsi vowed to continue defying government threats to clear them from their sprawling tent encampment in eastern Cairo – despite the massacre of scores of protesters by security forces over the weekend.

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Blue plaque to honour Welsh computing pioneer Donald Davies

His invention forms basis of how information is shared online today

Scientists discover the molecule responsible for causing feelings of depression

Protein receptor is found to release hormones that can cause anxiety and depression

Motorcycling: Fast learner Lowes promises to end Byrne’s run of victories at Brands

The British Superbike champion is chasing a fourth title but has lost his speed advantage

Gas cloud 'stretched like spaghetti' by supermassive black hole

Through studying the cloud's death throes, scientists hope to learn more about the supermassive black hole at the centre of the Milky Way

Dr Ioannis Ieropoulos inside the Bioenergy laboratory at the BRL, holding a phone powered by a microbial fuel cell stack.

Video: Urine-powered mobile phone charger lets you spend a penny to make a call

New microbial fuel cells contain bacteria that produce electricity from urine as part of their natural life cycle

Last week, we printed a selection of the world’s most highbrow jokes

More highbrow jokes: We didn’t realise what we were starting

We carried a selection and you responded in kind - here are our favourite 25

Paperback review: Higgs, By Jim Baggott

Baggott explains the significance of the Higgs boson: “it implies the existence of the Higgs field… without [it] nothing could be”, although “God Particle is a name heartily despised by practising scientists”.

Cockatoos show they can master the nuts and bolts

Cockatoos can crack tough puzzles and even unpick locks to reach a reward, scientists have found. 

Margherita Hack: Astrophysicist and activist who fought for left-wing causes in Italy

Margherita Hack, who died on 29 June at the age of 91, was an astrophysicist who explained her research in plain language for the public and who championed civil rights in her native Italy. She died in Trieste, where she had headed an astronomical observatory.

A meteorite trail is seen over Chelyabinsk

Shockwave from Russian meteor that left 1,000 people injured 'went twice around the earth'

Researchers said the event was the 'most powerful ever recorded' by the system

Paperback review: Spitalfields Life, By Gentle Author

London captured alive by a 21st-century Pepys

Russell Brand gives his best Doctor Who impression in a scarf and dark glasses at a recent film premiere.

Scarf at the ready? Russell Brand says he'd love to replace Matt Smith as Doctor Who

Comedian Russell Brand has revealed that he would love to replace Matt Smith as Doctor Who.

Sir Michael Stoute wants to ease the highly rated Telescope back

Sir Michael Stoute pulls Telescope out of Royal Ascot return

Those who were looking to Telescope to emerge as one of the stars of the season must wait a while longer to refocus their hopes. After some twinkling homework on the Newmarket gallops, the Sir Michael Stoute-trained colt galloped as swiftly up the betting for the Derby, only to defect from the Epsom showpiece with nine days to go because of a sore shin. Now he will miss his chance to shine at Royal Ascot, too.

End-of-course exams would be sat in the summer and students would have to wait a full year if they wanted to re-sit them under new system

The GCSE revolution: Michael Gove to introduce new 'I level' exam

Students would have to wait a full year if they need re-sit

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Special report: How my father's face turned up in Robert Capa's lost suitcase

Special report: How my father's face turned up in Robert Capa's lost suitcase

The great war photographer was not one person but two. Their pictures of Spain's civil war, lost for decades, tell a heroic tale
The unmade speech: An alternative draft of history

The unmade speech: An alternative draft of history

Someone, somewhere has to write speeches for world leaders to deliver in the event of disaster. They offer a chilling hint at what could have been
Funny business: Meet the women running comedy

Funny business: Meet the women running comedy

Think comedy’s a man's world? You must be stuck in the 1980s, says Holly Williams
Wilko Johnson: 'You have to live for the minute you're in'

Wilko Johnson: 'You have to live for the minute you're in'

The Dr Feelgood guitarist talks frankly about his terminal illness
Lure of the jingle: Entrepreneurs are giving vintage ice-cream vans a new lease of life

Lure of the jingle

Entrepreneurs are giving vintage ice-cream vans a new lease of life
Who stole the people's own culture?

DJ Taylor: Who stole the people's own culture?

True popular art drives up from the streets, but the commercial world wastes no time in cashing in
Guest List: The IoS Literary Editor suggests some books for your summer holiday

Guest List: IoS Literary Editor suggests some books for your summer holiday

Before you stuff your luggage with this year's Man Booker longlist titles, the case for some varied poolside reading alternatives
What if Edward Snowden had stayed to fight his corner?

Rupert Cornwell: What if Edward Snowden had stayed to fight his corner?

The CIA whistleblower struck a blow for us all, but his 1970s predecessor showed how to win
'A man walks into a bar': Comedian Seann Walsh on the dangers of mixing alcohol and stand-up

Comedian Seann Walsh on alcohol and stand-up

Comedy and booze go together, says Walsh. The trouble is stopping at just the one. So when do the hangovers stop being funny?
From Edinburgh to Hollywood (via the Home Counties): 10 comedic talents blowing up big

Edinburgh to Hollywood: 10 comedic talents blowing up big

Hugh Montgomery profiles the faces to watch, from the sitcom star to the surrealist
'Hello. I have cancer': When comedian Tig Notaro discovered she had a tumour she decided the show must go on

Comedian Tig Notaro: 'Hello. I have cancer'

When Notaro discovered she had a tumour she decided the show must go on
They think it's all ova: Bill Granger's Asia-influenced egg recipes

Bill Granger's Asia-influenced egg recipes

Our chef made his name cooking eggs, but he’s never stopped looking for new ways to serve them
The world wakes up to golf's female big hitters

The world wakes up to golf's female big hitters

With its own Tiger Woods - South Korea's Inbee Park - the women's game has a growing audience
10 athletes ready to take the world by storm in Moscow next week

10 athletes ready to take the world by storm in Moscow next week

Here are the potential stars of the World Championships which begin on Saturday
The Last Word: Luis Suarez and Gareth Bale's art of manipulation

The Last Word: Luis Suarez and Gareth Bale's art of manipulation

Briefings are off the record leading to transfer speculation which is merely a means to an end