Around 30 people are injured as Delhi police break up an anti-corruption protest led by controversial yoga guru Baba Ramdev.
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Andy Newell was shot by a rogue policeman in Afghanistan
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Forces’ charity Help for Heroes is set to reach £100m in public donations, after three and a half years of work.
It is hoped a fundraising bike ride through the battlefields of France will push through the barrier, raising £1m.
Around 300 of the charity’s supporters will start the bike ride from Portsmouth on Sunday afternoon, finishing in Paris on Friday.
The charity builds specialist recovery centres for soldiers injured in Afghanistan and Iraq.
Some of the cyclists have lost limbs and will be using their hands to operate their bikes.
Andy Newell, who was one of the soldiers who inspired the charity, is taking part in the ride.
He was shot through the arm by a rogue Afghan policeman while he served in Afghanistan and spent months in hospital.
The retired Para told the BBC: “People stepped up to the mark for me when I needed it, from Help for Heroes and other soldiers I knew and didn’t know helped me, so I want to do my bit for them.”
The charity’s founders, Bryn and Emma Parry, say they are amazed at the public’s generosity.
But they urged people to continue their support to ensure it could provide a lifetime of support for men and women who have sustained life-changing injuries.
Bryn Parry, said: “It has really restored my faith in humanity – that people are prepared to do this, and they’re not just giving money, they’re giving of themselves, and most of the money we raise is people doing something.”
They said when they launched the charity they expected to raise a few thousand pounds.
Emma Parry said: “One of my very special memories was opening, or a cheque being opened in the office, for £98,000 in January 2008. We’ll never forget it.
“We opened the cheque and read the amount – I think someone had to come and check that it was the right amount – it was just phenomenal to think someone would be generous enough to do that.”
The rehabilitation complex, Headley Court in Surrey, which was opened by Prince William last year, cost millions of pounds and the charity is building several other recovery units across the UK.
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The interactions that form comparatively large moons like our own were thought to be rare
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About one in 10 rocky planets around stars like our Sun may host a moon proportionally as large as Earth’s, researchers say.
Our Moon is disproportionately large – more than a quarter of Earth’s diameter – a situation once thought to be rare.
Using computer simulations of planet formation, researchers have now shown that the grand impacts that resulted in our Moon may in fact be common.
The result may also help identify other planets that are hospitable to life.
A report outlining the results will be published in Icarus.
Last year, researchers from the University of Zurich’s Institute of Theoretical Physics in Switzerland and Ryuja Morishima of the Laboratory for Atmospheric and Space Physics at the University of Colorado in the US undertook a series of simulations to look at the way planets form from gas and smaller chunks of rock called planetesimals.
Our own moon is widely thought to have formed early in the Earth’s history when a Mars-sized planet slammed into the Earth, resulting in a disc of molten material encircling the Earth which in time coalesced into the Moon as we know it.
The team used the results from their initial study as the input to a further “N-body simulation” to find out the likelihood that large-scale impact events could form large satellites in the same way.
Their results showed that there is about a one in 12 chance of generating a system comprising a planet more than half the Earth’s mass and a moon with more than half that of our Moon (taking into account the errors in the simulation, the full range of probabilities was between one in 45 and one in four).
Sebastian Elser of the University of Zurich said the new estimates for the likelihood of Moon-sized satellites could inform the hunt for extrasolar planets.
Such large moons can confuse the measurements that spot the planets, and knowing that large satellites may be common could make the measurements easier.
The cataclysmic impact that resulted in the Moon still presents a number of computational mysteries
Also, our Moon has served to stabilise the tilt of the Earth’s axis – or its obliquity – which could otherwise have varied drastically over relatively short time scales. That in turn would wreak drastic changes to the way heat from the Sun is distributed around the planet.
It thus can be said that the Moon’s presence made a more stable environment in which life could evolve, Mr Elser said.
“Checking for the possibility of an obliquity-stabilising moon is a good thing if you’re trying to find out how many habitable worlds are out there in the galaxy,” he told BBC News. “But it’s surely not the only one and not the most important.”
Eiichiro Kokubo is a planet formation expert who has published widely on the mechanics behind the development of both the planets in our Solar System and the Moon.
He called the result an “interesting estimate” but cautioned that there are several as-yet unknown parameters “which greatly affect lunar formation and evolution and thus the probability of hosting a large moon”.
He told BBC News that, for example, it is still impossible to put numbers to the effects of a planet’s initial spin before impact, or how the disc of material is formed and evolves after it.
“I think we should take the paper as a trial calculation based on what we know about formation of terrestrial planets and moons today,” he said.
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President Saleh had promised to step down but failed to sign a deal to do so
Yemen’s President Ali Abdullah Saleh has flown to Saudi Arabia for medical treatment, a day after he was wounded, Saudi officials say.
Uncertainty surrounded Mr Saleh’s whereabouts for much of Saturday.
Sources in Yemen told the BBC that Mr Saleh had a piece of shrapnel below his heart and second-degree burns to his chest and face.
An uprising demanding that Mr Saleh leave power has led to violence bringing Yemen close to civil war.
The Yemeni president arrived in the Saudi capital Riyadh aboard a Saudi medical plane.
A Gulf nation diplomatic source told BBC Arabic that the decision to transfer Mr Saleh to Riyadh was taken after Saudi doctors consulted with a German medical team.
A source told Reuters news agency that Mr Saleh walked off the plane after arriving in Riyadh, but had visible wounds to his face, neck and head.
A second plane carried members of the president’s family, AFP news agency said, quoting an unnamed Saudi official.
Mr Saleh and several senior officials were praying at the al-Nahdayn mosque inside the presidential compound in the south of Sanaa on Friday afternoon at the time of the attack.
The mosque was originally thought to have been hit by rockets, but there are now suggestions someone may have planted a bomb there.
The attack on the mosque left seven of Mr Saleh’s bodyguards dead and several officials wounded
The president broadcast an audio message on Friday after he was wounded but did not appeared in public.
In the broadcast, he blamed the attack on an “outlaw gang” of his tribal foes – an accusation denied by Sheikh Sadeq al-Ahmar, the head of the Hashid tribal federation, whose fighters have been clashing with security forces.
More than 160 people have been killed in the fighting that began on 23 May and has brought Yemen to the brink of civil war.
After reports of a Saudi-brokered ceasefire, Sanaa was calm for much of Saturday.
But overnight fighting resumed, with the sounds of heavy shelling in the northern parts of the capital, freelance journalist Iona Craig, in Sanaa, told the BBC.
The prominent Ahmar family has been financing the opposition and helping sustain protesters, who have been demanding Mr Saleh’s resignation since January despite a crackdown that has left at least 350 people dead.
Western and regional powers have been urging Mr Saleh to sign a Gulf Co-operation Council-brokered deal that would see him hand over power to his deputy in return for an amnesty from prosecution.
He has agreed to sign on several occasions, but then backed out.
With Mr Saleh out of the country, it is not clear who is in charge. The constitution calls for the vice president, Abd-Rabbu Mansour Hadi, to take over, including command of the armed forces and security services.
But Mr Saleh’s son Ahmed commands the elite Republican Guard and other relatives control security and intelligence units.
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