The latest stories from the Science & Environment section of the BBC News web site.
Updated: 3 hours 38 min ago
Chile's southern coast has been hit by the biggest ever "red tide" in history. It's caused by toxic algae which is killing sea life and damaging the local fishing economy.
Nasa announces the discovery of more than 100 Earth-sized planets orbiting alien stars.
Five Pacific islands have disappeared as a result of rising sea levels in a first confirmation of the impact of climate change on coastlines, scientists say.
The EU's Sentinel-3a satellite offers a peek at what will be one of its most fundamental products - a map of sea surface height anomalies.
Cross-continental study reveals how camels' genetic diversity is shaped by ancient trade routes.
Scientists have published their first global assessment of the state of the world's plants.
A new report looking at the state of the world's plants estimates that 390,900 species are known to science.
Nasa images capture Mercury transit the Sun, one of the few times it will do so this century.
The Solar System's smallest planet has made one of its irregular passes between the Earth and Sun.
A man who sexually assaulted and stabbed a girl 32 years ago has been given a life sentence for her murder.
Europe's rover mission to Mars is "drinking in the last chance saloon", warns the European Space Agency's director general, who says the project cannot have an open-ended schedule or budget.
Scientists say they have developed an invisible elastic film that can be applied to the skin to reduce the appearance of wrinkles and eye bags.
The woman accused of leading one of Africa's biggest smuggling rings
A study to find out how a form of leprosy is affecting the UK's threatened red squirrels is to be carried out on Dorset's Brownsea Island.
The cave divers who went back for their dead friends
Thousands of people have take advantage of a move by the authorities in Paris to close the famous Champs Elysees thoroughfare to traffic.
Tributes are paid to renowned naturalist and broadcaster Sir David Attenborough as he turns 90.
Conservationists have launched a global campaign asking the public to use a smartphone app to help tackle the illegal trade in wildlife.
Scientists say new fossils found in China are of a crocodile-like creature that was the first known plant-eating marine reptile.
The world's sleeping patterns have been revealed by scientists analysing data collected from an app.