News An aerial picture of the Grand Canyon in Arizona from around 30,000 feet (10,000m)

It was thought that the global landmark was perhaps 70million years old

The trail of a falling object is seen above a residential apartment block in the Urals city of Chelyabinsk, on February 15

Where did the Russian meteor come from - and where's it going? Astronomers calculate orbit

The final path of meteor that injured about 1,000 people as it blasted to earth over the Russian city of Chelyabinsk has been plotted by astronomers.

A meteor streaks across the sky of Russiaís Ural Mountains

Sun-powered space lasers, gravity tractor beams, or a nuclear device - how to stop asteroids and meteors from hitting the earth

After the week in which an asteroid passed a mere 17,000 miles from the earth, and a meteor injured over a thousand people in Russia one scientist warns 'duck and cover' is not an option

A meteor streaks across the sky of Russia's Ural Mountains

Russian meteor strike that injured 1,200 people was US weapons test, claims politician

The meteor, which was travelling at around 33,000 mph rained down over the Ural Mountains last week

'Sporadic meteor': Fireball reported across California sky

Hours after a meteor exploded over Russia and injured more than 1,000 people and an asteroid passed relatively close to Earth, people in California reported seeing an unusual flash of light over the San Francisco Bay area that left many startled and thrilled.

The trail of a falling object is seen above a residential apartment block in the Urals city of Chelyabinsk, on February 15

Almost 1000 injured as 10-ton meteor blasts across Russian sky, causing explosions and smashing windows

Many of those wounded, 67 of whom are children, were hurt by broken glass caused by shockwaves and hurtling debris

The snappily named 2012 DA14 will miss earth by a mere 17,200 miles

2012 DA14: A close call for asteroid big enough to flatten London

An asteroid as big as an Olympic swimming pool has narrowly missed the Earth this evening, becoming the closest ever for an object of that size.

The view from a windscreen camera as the meteor streaked over the Urals

A cosmic coincidence, but the Chelyabinsk meteor and 2012 DA14 are reminders of the deadly power of small asteroids

Perhaps mother nature is telling us to take this threat a little more seriously

Asteroid DA14 is the size of a city block and will pass within 17,000 miles of Earth in February

How to defend against asteroids and meteors

Typically the preserve of science-fiction, now top of the news agenda, the prospect of an asteroid striking earth is raising alarm. This morning a meteor streaked across the sky in Russia, causing explosions and injuring 400 people. Later today a 150-ft asteroid will shave past earth at 17,000 miles distance, the closest recorded. If it hit, it could flatten London. So what defences do we have?

Video: 2012 DA14 asteroid to skim past the earth

An asteroid measuring 150km is set to fly past the earth on Friday 15 February.

Stargazers prepare their instruments

How to watch asteroid 2012 DA14's record breaking fly-by of earth

At its peak closeness, DA14 will come within 17,000 miles of our planet

'Close' encounters of the asteroid kind: 130,000 ton asteroid to make closest ever fly-by of Earth

2012 DA14 asteroid pass within 32,000km of earth, inside the orbit of communication satellites

Whitehall farce funnier than the show in question

Why should the comic be criticised for making good on his privileged upbringing?

'Black Beauty' rock is a 2 billion year old unique 'meteorite' from Mars, say scientists

Coal-coloured rock estimated to be 2 billion years old, and contains more water than most of the red-planet meteorites so far discovered

'Brighter than a full moon': The biggest star of 2013... could be Ison - the comet of the century

A comet discovered by two Russian astronomers will be visible from Earth next year. Get ready for a  once-in-a lifetime light show, says David Whitehouse

Ice discovered on north pole of Mercury

Just in time for Christmas, scientists have confirmed a vast amount of ice at the north pole - on Mercury, the closest planet to the sun.

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