BBC News Science & Environment
By Justin Rowlatt
Chief environment correspondent
Nasa systems engineer Ian Clark, who designed the message, explains what the code means.
A big iceberg breaks away from the Antarctic, close to Britain's Halley research station.
By Jonathan Amos
BBC Science Correspondent
Anna Hursey,14, from Cardiff, who is a United Nations champion for climate change in sport.
By Roger Harrabin
BBC environment analyst
Bitaté Uru Eu Wau Wau patrols the rainforest to stop land grabbers but now some of the precious spots are for sale on Facebook.
K-pop superstars Blackpink have emerged as the latest force in the global fight against climate change.
By Claire Marshall
Environment correspondent, BBC News
By Joao Fellet & Charlotte Pamment
By Paul Rincon
Science editor, BBC News website