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Science aside, Stephen Hawking appeared in a number of hit television shows.

Remembering some of the key theories and quotes of the world renowned physicist, who has died.

Colleagues of the visionary physicist Stephen Hawking say he left a unique legacy.

From being diagnosed with a life-threatening disease at 21 to experiencing zero-gravity.

The physicist, who battled motor neurone disease for most of his life, has died at the age of 76.

From meeting presidents to popes, we look back at some of Professor Hawking's most notable public appearances.

Theresa May and Eddie Redmayne are among those to mark the world renowned scientist's death.

We’re not yet optimizing biofuel production for both economic and environmental factors

Facing the reality of human-caused warming, we now look for ways to reduce the problem so that future generations will not inherit a disaster. So, what can we do now to help the future?

The easiest answer is to use energy more wisely and quit wasting our precious resources. Second, we can increase our use of clean energy, particularly wind and solar power. These are great starts but we will still need some liquid fuels and for those, we can make decisions about the best fuels for the environment. There has been extensive conversation recently about biofuels and how they may help solve the climate problem.

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From black holes boiling themselves out of existence to equations describing the entire history of the Universe.

The visionary physicist died in his home near Cambridge University, where he did much of his ground-breaking work.

Despite a crippling illness, Stephen Hawking became one of the most respected scientists of his age.

Recycling industry in Victoria and NSW on verge of collapse, Senate inquiry told

Australia’s kerbside recycling systems are at risk of collapse, a Senate inquiry has heard. China’s ban on importation of recyclable rubbish has left councils and state governments in Victoria and New South Wales scrambling to find space to stockpile growing mounds of waste.

An estimated half of Australia’s recyclable waste was going to China before the ban, the hearing was told, although the precise share of waste exported was not known.

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Tributes highlight his breakthrough research as well as his personality and inspiration to millions.

Remembering some of the key theories and quotes of the world renowned physicist, who has died.

The physicist, who battled motor neurone disease for most of his life, has died at the age of 76.

UK households throw away more than 25m slices of bread each day, says anti-food waste campaign

Around 25m slices of bread are thrown away every day in the UK – more than a million an hour – because people do not get around to using it in time and worry it is stale.

Now a new campaign from the anti-waste charity Love Food Hate Waste is urging consumers to freeze bread and toast it straight from the freezer, and to consider eating toast as a snack at any time of day.

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The physicist, who has died aged 76, had motor neurone disease.

Wenlock Edge, Shropshire: this is mythologised woodland, a secular sacred place, a hunting ground and a sanctuary

Sunlight pools on thousands of wild garlic leaves on the bank of an abandoned railway cutting. Trees stand in companionable silence, the breath between them is slight. Days ago, slender ash trunks rattled like yacht masts in a marina, hawthorns hissed in the east wind, great oaks and steeple limes soughed in deep snowy murmurs. Much of the storm wreckage has been cleared from the path; it is now a gallery full of early birdsong and light falling in patches as if from high windows.

Yesterday a blackbird repeated a one … two-three … four syllable phrase of song; today it is elaborated by bright description and excited story. Shakespeare wrote in As You Like It about the bird under the greenwood tree singing “come hither” with no enemy but “winter and rough weather”.

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Visionary physicist Stephen Hawking has died, aged 76.

Macquarie Group makes its biggest-yet push into Australian renewables market, with equity stake in Murra Warra wind farm.