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It took seven years for the US-European mission to get to the ringed planet, launching in 1997.

North American ash trees, that face extinction due to an invasive beetle, and African antelope join the latest IUCN list that includes 25,000 species at risk of extinction

• Red list: ash trees and antelopes on the brink of extinction

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David Malin has spent four decades photographing space. Now retired, he has held a competition to inspire other astrophotographers.

Scientists warn once-common species are disappearing faster than they can be counted as North America’s ash trees join IUCN’s list of endangered species due to threat of an invasive beetle

• In pictures: once-common ash trees and antelope added to red list

Native ash trees, abundant across North America, are on the brink of extinction as an invasive beetle ravages forests, according to the new red list of threatened species from the International Union for Conservation of Nature (IUCN).

The list now includes more than 25,000 species at risk of extinction and the scientists warn that species, such as the American ashes and five African antelopes, that were thought to be safe, are now disappearing faster than they can be counted.

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British athlete Mark Beaumont is expected to complete his world tour on Monday after 79 days in the saddle, smashing the previous record of 123 days

Endurance cyclist Mark Beaumont is expected to arrive in Paris on Monday 18 September, 79 days after setting off on his attempt to cycle around the world in 80 days.

The Guardian joined Beaumont in Lisbon on Wednesday, where he arrived on an overnight flight from Halifax in Canada to start the final leg of his record-breaking challenge. Despite cycling an average of 240 miles over 16 hours every day since 2 July, he looked fresh and sounded upbeat as we ticked off more miles on our way to the Spanish border. Yet he admitted the ride has taken its toll on him, both mentally and physically.

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An Aboriginal group in Tasmania says a state government plan to reopen drive tracks that run through the Tarkine would see areas of significant cultural and historical value destroyed.

Environmental activist group says it is detaining vessels for Timorese police after Chinese-owned fleet allegedly targeted sharks

The ocean activist group Sea Shepherd says it has delivered armed Timor-Leste police on to a Chinese-owned fishing vessel in a dawn raid and is detaining the vessels for the police after it was found targeting sharks.

Following a two-week hunt for the Pingtan Marine Enterprises fleet, the Sea Shepherd boat M/Y Ocean Warrior found the vessels 150km south of Timor-Leste, allegedly fishing with gill nets anchored to the bottom of the sea, which would suggest they were targeting bottom-dwellers such as sharks.

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Chair of newly formed Energy Security Board, Kerry Schott, says that by harnessing demand management in Australia, "we can all stop worrying about building new plants of any description."

Sandy, Bedfordshire A leave-taking of Britain is playing out in the skies as swifts and martins fuel up for their epic journey

Through these last weeks of summer, the autumn migration has played out in the skies, though it goes largely unnoticed by most below. A trickle of an exodus began over the bank holiday with three dark specks, way, way up in the blue. Specks, yes, but you could see, from the wings curved like taut bows, that they were unmistakably swifts.

Hatched on northern ledges they had become citizens of heaven. They deviated on insect-chasing sallies in all directions, but were overall tracking south-west.

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The Australian energy statistics provides annual energy consumption, production and trade statistics and analysis.

Wirsol Energy adds ready-to-build 110MW Wemen solar farm near Mildura to its planned 1GW by 2020 pipeline.

A pair of giraffes with leucism, a condition that inhibits pigmentation in skin cells, have been filmed by conservationists for the first time

A pair of rare white giraffes have been spotted in Kenya, to the delight of local residents and conservationists.

The reticulated giraffes, a mother and child, suffer from a genetic condition called leucism, which inhibits pigmentation in skin cells. Unlike albinism, animals with leucism continue to produce dark pigment in their soft tissue, which explains the white giraffes’ dark eyes and other colouring.

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EnergyAustralia's Mark Collette tells ABC TV replacing Liddell by 2022 not a problem, but a race to the future and a huge industry opportunity.

GE Renewable Energy has unveiled its brand-new 4.8–158 onshore wind turbine, GE’s largest high efficiency turbine to date.

The Saturn probe takes some final images ahead of its mission-ending dive into the ringed planet.

Windlab lands 10-year PPA with CS Energy for ground-breaking wind-solar-battery storage project in north Queensland.

One power optimiser for two module solution now locally approved.

High mountains of Asia hold biggest store of frozen water outside the poles and feed many of the world’s great rivers, including the Ganges

Asia’s mountain glaciers will lose at least a third of their mass through global warming by the century’s end, with dire consequences for millions of people who rely on them for fresh water, researchers have said.

This is a best-case scenario, based on the assumption that the world manages to limit average global warming to 1.5C (2.7F) over pre-industrial levels, a team wrote in the journal Nature.

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We'e done the modelling on how to replace Liddell with a dispatchable renewable energy plant - including wind, solar, storage and gas. We just need politicians to get out of the way and get on the bus.

Striking new report by one of world's biggest independent energy consultants shows dramatic decline in coal, and oil industry and a peak in global energy demand. Solar dominates, and has only just begun its path to becoming biggest source of energy.