BBC

We track some of the key moments in the spread of Covid-19 around the world.

More than 150 people in Bougainville have filed a complaint against the embattled Rio Tinto company.

The underground lakes were detected in the Red Planet's south polar region.

Environmental groups have called the move to revoke regulations that protect mangroves a "crime".

Low flush toilets often waste more water than they save due to poor engineering and confusing buttons.

The naturalist uses a UN event to call on world leaders to do more to protect nature.

A species of maple tree gives the best protection from damaging sunlight, a study suggests.

Countries must act now to reverse biodiversity loss, Boris Johnson will tell a UN event later.

People in Lake Jackson, Texas, are urged to take precautionary measures amid contamination concerns.

The Mangrove Photography Award winners show the beauty and fragility of the unique ecosystems.

Efforts now turn to the disposal of some 350 whale carcasses after Australia's worst ever stranding.

The new coronavirus restrictions have been met with mixed reviews.

The PM promises he won't be caught "lagging" on green polices.

A skipper from Scotland has been telling how an orca pod attacked his yacht in the seas off north west Spain.

The broadcaster gains a million followers within five hours of joining the platform.

The satellite tag from a bid of prey that disappeared six years ago was found by a walker in Perthshire.

Global warming is behind the scale and impact of recent wildfires in the western US, scientists say.

New technology has been unveiled which allows humans to ask robots questions and understand their actions.

It's official, bird song did sound different during lockdown, according to a scientific study.

The UK prime minister says the UK holds extraordinary potential for wind power.