Having become the closest-ever human-made object to our star, the Parker spacecraft returns returns its first data
Snowy mountain winters are being squeezed into shorter periods, threatening water supplies and increasing wildfire risk.
With around 23 billion chickens on the planet at any one time, the bird is a symbol of our times, say scientists.
The UK claims to be a leader in climate change - but is it?
The world's strangest sharks are at risk of extinction
Where we are in seven charts
The house inside a lab helping make UK homes energy-efficient
What would happen if a solar storm hit Earth?
Stage by stage guide
15 sayings from around the world