BBC

Hen harrier Heulwen had flown across Snowdonia when her satellite tag stopped transmitting.

Most of the planet hasn't yet been mapped properly. Autonomous vehicles are set to change all that.

Scientists are a step closer to explaining a 10,000-year-old crime mystery on the island of Madagascar.

Etched with an "ochre crayon", the 73,000 year old drawing looks a little like a modern-day hashtag.

Artificial muscles could assist mobility as people age.

Millions of acres of trees and energy crops will be needed to help the UK become carbon neutral by 2050, say scientists

The first major assessment of the state of the fungi kingdom says they are vital for life on Earth.

Shifting to a healthier diet can reduce a person's water footprint by as much as 55%, according to a study.

The National Trust conservation project aims to boost wildlife on the Holnicote Estate in Exmoor.

Governor Jerry Brown signs legislation committing California to carbon-free electricity by 2045.

Hundreds of hydropower projects threaten to harm Bosnia's rivers, protesters say.

Antonio Guterres calls for leadership to break the paralysis on the "defining issue" of our time.

A satellite system that for 30 years has tracked animals will expand to track all manner of objects.

A wildlife trafficking watchdog says it has found hundreds of examples of animal trading.

The World Meteorological Organisation says there's a 70% chance of a weak El Niño event by the end of this year.

It's come close to cancellation several times, but could the successor to the Hubble telescope make the greatest ever discovery?

The ambitious project aims to tackle a collection of waste known as the Great Garbage Patch.

Investigations are under way to determine why large numbers of whales are dying off Scotland and Ireland.

Japan is trying to convince the world the time has come to make commercial whaling legal again.

Huge installations of wind turbines and solar panels would boost rainfall and vegetation in desert areas.