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Warren, a rhinoceros calf, responds to being called while on a walk with his carers at the Meyersdal Nature Estate in South Africa on Monday. Warren comes running back after being called by name and also accompanies some dogs on a trip around the sanctuary. The Meyersdal Nature Estate is run by Working with Rhinos, a charity dedicated to rescuing and rehabilitating rhinoceros and indigenous wildlife from the area

• Watch the full video on Working with Rhinos’ YouTube channel
  

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Sandy, Bedfordshire What are they tasting, and what makes them dab their egg on one particular leaf above all others?

Day by day, summer has been eating its way through the nasturtium at the back door. Over the past fortnight, I have conducted my own leafwatch. Victorian naturalists used systematic, meticulous, studies to gain insights: I’m looking in my lunch break. Even so, during these half-hour snatches, I’ve discovered a tiny something that contradicts an authoritative textbook.

We call them cabbage whites, the butterflies with a taste for brassicas, but these insects have a fondness for nasturtiums too. One flits over the fence and breaks its zigzag course through the garden to home in. It circles and lands on leaf after leaf, wings whipped into a frenzy at the point of exact touchdown.

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ABC Science journalist Bernie Hobbs takes us through the latest stories - in this case how fire that brought warmth and comfort to early humans may also have triggered the emergence of deadly tuberculosis and how Jupiter's Great Red 'Hot Spot' may explain atmospheric mystery.

National eNews - Do we need emergency action on climate?

Queensland authorities say they have identified the vessel that spilled up to 15 tonnes of oil off Cape Upstart in July 2015

An unnamed foreign ship faces prosecution over an oil spill on the Great Barrier Reef after a 12-month investigation by Queensland government agencies.

Maritime investigators claim they have identified the vessel that spilled up to 15 tonnes of oil in reef waters off Cape Upstart in July 2015, which washed up on mainland beaches and islands north of Townsville and triggered a response costing $1.5m.

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As NSW’s relatively generous solar rates come to a close, 150,000-odd solar homes are looking to make the transition as painless as possible. So what are your options? We break them down for you.

ACT govt-funded installation of 500kW solar array is underway at Canberra Hospital, part of project that will save it $490,000 by 2017-18.

The overall tone of Clean Energy Summit is much more upbeat than last year, and it appears that the political resistance to renewables is fading.

BNEF and Clean Energy Regulator warn renewables market headed for shortfall, RET policy has "fundamental holes in it.”

After 12 years of planning and testing, Solar Impulse has finally completed its epic voyage around the world – all without using a single drop of fuel.

Startups are figuring out ways to beat incumbents in their own game. Virtual power plants may be the answer.

Josh Frydenberg's apparent shift in thinking on renewables is welcome, but his call to end moratoriums on unconventional gas is profoundly out of step.

New technology subsystems enrich 5i energy intelligence platform with real-time, dynamic, human comfort sensing to add how “we feel” to big data analysis.

JOVIAN HEAT: The howling turbulence of Jupiter's Great Red Spot may be superheating the upper atmosphere above the storm, researchers say.

Josh Frydenberg says wind and solar not to blame for recent price spikes, noting that price volatility is "not a new thing". But while he accepts coal is in decline, his messaging was mixed, and wants more gas into the electricity system.

A new class of antibiotics has been discovered by analysing the bacterial warfare taking place up people's noses, scientists report.

Massive increases in fines for riding without a helmet or running a red light are just the latest in the city’s ignoble history of deciding cyclists are a problem

It’s almost five months since fines for various cycling infractions, including riding without a helmet, cycling dangerously or jumping a red light were massively increased in New South Wales. Some fines went up from $71 to $425 (£40 to £240). Riders were also obliged to carry ID. At the same time, a new law spelled out minimum passing distances drivers should give riders when they overtake bikes.

Are cyclists feeling much safer? It’s fair to say the impact has been mixed. In May it turned out that while police had by then energetically handed out 1,500 of the new fines to cyclists, mainly over helmet use, just four motorists had felt the force of the law for close overtakes. There were also reports of overzealous enforcement of the rules, including a dangerous cycling citation for someone trackstanding at a red light.

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Jupiter's giant storm is somehow heating the planet's upper atmosphere - possibly by means of sound waves - astronomers discover.

As Philae, the robotic lander, is finally switched off and the world says goodbye.

George McRobie, who has died aged 90, was the last surviving founding member of Practical Action, an international organisation harnessing technology to help developing countries. He was a close associate of the economist EF Schumacher (my late husband, known as Fritz, who was the author of the influential text Small Is Beautiful) and for many years they worked together, initially at the National Coal Board and then, in 1965, in setting up the Intermediate Technology Development Group (ITDG), now known as Practical Action.

When Fritz died suddenly in 1977, George stepped in to become chairman of the organisation, and worked tirelessly to maintain the momentum they had generated. His contribution to both the green movement and the appropriate technology movement as a whole was immense. In 1981 George completed Small Is Possible, the last of Fritz’s trilogy of books, which laid out how the ideas and theories on sustainability in the first two books, Small Is Beautiful and A Guide for the Perplexed, could be applied to everyday life.

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