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Scientists use the precious element to grade the quality of the natural sweetener.

The UK’s first climate assembly is holding its final sessions this weekend.

Military scientists at Porton Down have shown the BBC the work they are doing investigating coronavirus.

The chick is part of a programme to reintroduce breeding pairs of the birds in the south of England.

As lockdown is eased, we all become participants in a vast, very cautious observational experiment, experts say.

The RSPB says it has been "overrun" by reports of birds of prey being illegally killed.

Substances used for air conditioning in new cars are building up in the environment

Archaeologists say up to 4,000 people may have lived in more than 800 huts perched high on the Tap O' Noth.

The test, now approved in the UK, can tell who has had Covid-19 - but gives no guarantee they are immune.

Researchers say they have developed a lab-grown strain of microalgae which is more tolerant to heat.

Canadian firm GHGSat, which carries out methane monitoring from space, looks to set up a UK hub.

The pandemic could have an impact on conservation efforts for years to come, say conservation experts.

Why the people on the only continent without a recorded case of coronavirus are in lockdown.

Fluttering creatures of the night are also vital pollinators of plants and flowers, say scientists.

Hormone-fed beef and chlorine-washed chicken should remain banned in England. the government is warned.

Doubt is cast on claims fossil fuel companies are curbing their CO2 in line with net zero targets.

The fall in the carbon dioxide emissions is not just due to the country's coronavirus lockdown.

Modern humans began to edge out the Neanderthals in Europe earlier than previously thought.

The billionaire hopes to raise $500m to support his businesses including Virgin Atlantic.

The four-legged robot carries a camera and speaker to play social distancing messages in Singapore.

The submerged mud berth on the River Roach in Essex is recognised as a nationally important site.

"Extreme caution" will be needed when the UK eases lockdown, Grant Shapps says as he announces transport measures.

Funding for English local authorities is likely to be unveiled to encourage people to be more active.

The Hawaii-based Gemini telescope produces a super-sharp picture of the gas giant in the infrared.

Certain habitats can help dampen the spread of ash dieback, which threatens ash trees.

The former Bank of England governor says countries should invest in a cleaner economic recovery.

Bicycle shops across the UK say demand for new bikes, and repairs for old ones, has risen sharply.

Park rangers in Africa say the closure of safari tourism is leading to an increase in poaching.

An unseen object is found to be lurking in a double-star system a mere 1,000 light-years from Earth.

One of the hardest tasks in Earth observation is tracking tiny changes in the shape of the ground.

A study has identified a mutation that its authors say could make the coronavirus more infectious.

Prof Neil Ferguson, who advised ministers on coronavirus, says he "made an error of judgement".

New scientific research, from Germany of all places, suggests English footballers are actually good at spot-kicks.

The actor is well known for his daring stunts, but this takes things to another level.

Some governments want to channel their economic recovery plans into low-carbon industries.

How the global pandemic is limiting carbon emissions and what this will mean for climate change.

Many activists have had to stop their usual work due to the pandemic. Here's how they're responding.

UK government advisors say post-pandemic recovery funds should go to firms reducing carbon emissions.

The North Magnetic Pole has been racing across the top of the world, from Canada towards Siberia.

Areas such as India, Australia and Africa are predicted to be among the worst affected.

Mink have caught Covid-19, adding to the list of infected animals, and prompting calls for trade bans.

Scientists say the microbe - found in the wild near Lake Victoria - has enormous potential.

The identity of the "intermediate host" animal that first passed the coronavirus to a human may never be found, say scientists.

How the outside world can be good for body and mind - with expert tips on making the most of it.

The Food and Drug Administration authorises emergency use of the experimental anti-viral drug.

Native woodlands can resist the spread of invasive species if they block light reaching the ground.

Science instruments sense a big dip in seismic noise as the population stays at home.

Birds, elephants and primates are among those missing guests, zoos around the world say.

Mediterranean sediments are shown to have up to 1.9 million tiny plastic pieces per square metre.