Greenhouse gas output in the UK fell almost 8% in 2014, although emissions from transport and agriculture rose slightly, official figures show.

A solar-powered bus described by its Ugandan makers as the first in Africa has been driven in public.

Cutting down trees in rainforests facilitates the spread of invasive black rats, a study suggests.

UK scientists have been given the go-ahead by the fertility regulator to genetically modify human embryos.

Astronomers have discovered the largest known solar system, consisting of a large planet that takes nearly a million years to orbit its star.

Scientists have described a new species of bird in northern India and China, called the Himalayan forest thrush.

The Vaccine Alliance, Gavi, has signed a $5m (£3.5m) deal for an Ebola vaccine, to protect against future outbreaks of the deadly disease.

New figures from Brazil show a further rise in the number of babies born with abnormally small heads to mothers infected with the Zika virus.

Insurance claims for damage caused by floods so far this winter will reach £1.3bn, the Association of British Insurers (ABI) has said.

A massive bushfire in Western Australia that killed two people continues to burn, but milder conditions are helping firefighters bring it under control.