Ex-Farc rebels in Colombia, who spent decades fighting the government over land and power, have reinvented themselves as eco-warriors protecting the Amazon from illegal logging.
For the first time in 15 years divers have explored the Titanic wreck and say it is deteriorating.
Campaign groups in France are teaching people how to protest effectively, ahead of the G7 summit.
Unwanted devices can contain elements that the world is running out of - so how can you help?
In a disused air raid shelter one company is growing crops, but what are the pros and cons of vertical farming?
The cows on this floating farm in the Netherlands are helping find ways of making food sustainably
It's a family business which has been around since 1942 - but now the last remaining cows are being sold off.
Scientists have found that particles of plastic are falling out of the sky with snow in the Arctic.
'Dr Becky' receives thousands of views on her YouTube channel which answers questions about the universe.
Luca Parmitano played from the International Space Station to a cruise ship in the Mediterranean Sea.