Science Update
Mustard gas among toxic waste in Wales' old landfill sites
Environmental campaigners dub the 1,572 locations across Wales "ticking time bombs".
Dinosaur-killing asteroid strike gave rise to Amazon rainforest
The asteroid that killed off the dinosaurs gave birth to tropical rainforests, a study suggests.
USS Johnston: Sub dives to deepest-known shipwreck
A submersible has reached the USS Johnston, which lies 6.5km beneath the waves in the Pacific.
Seal Alliance asks walkers to give the animals space as lockdown eases
The Seal Alliance warns that getting too close to the animals can lead to their injury and death.
Garden centres 'failing to stop peat sales'
Just one of 20 retailers contacted by The Wildlife Trusts says it will remove peat from its shelves this year.
Then and now: Rising temperatures threaten corals
In a monthly feature, we explain how warming waters threaten the survival of a wonder of the seas.
Should airports be allowed to expand?
Climate change: Should aviation be allowed to expand?
How satellite images are helping one country hand out cash
Togo has found a new way to send emergency cash to people struggling in the pandemic.
Climate change: Net zero targets are 'pie in the sky'
Indian minister lashes out at plans to cut emissions dramatically over the next three decades.
COP26: Government has 'no plans' to delay climate summit
Downing Street sources reject reports the COP26 meeting in Glasgow will be postponed until next year.
Sewage discharged into rivers 400,000 times in 2020
Waterways in England had sewage discharged into them for three million hours
Skull of dinosaur called 'one who causes fear' found in Patagonia
The animal had horns and a large skull making it a fearsome predator around 85 million years ago.
Science cuts could see experts leave UK, warns Nobel laureate
Nobel laureate Sir Paul Nurse also says science is crucial for dealing with climate change.
A few frequent flyers 'dominate air travel'
A small minority of frequent flyers dominates air travel in countries with high aviation emissions.
Climate change: China absent from key UK meeting
Despite an official UK invite, China is not taking part in a key summit on climate and development.
Japan's cherry blossom 'earliest peak since 812'
The early peak is thought to be linked to climate change as spring temperatures rise.
Uganda climate change: The people under threat from a melting glacier
A glacier in western Uganda is disappearing, endangering the traditions of those who live nearby.
Long spaceflights and endurance swimming can 'shrink the heart'
Spaceflight and endurance swimming can both cause the heart to lose mass, say researchers.
Covid: Secret filming exposes contamination risk at test results lab
A BBC undercover reporter saw practices that could mean people receiving a wrong test result.
Climate change: Consumer pose 'growing threat' to tropical forests
Imports of coffee, cocoa and beef in rich countries cause the loss of almost four trees per person per year.