From slime mould to space junk, and Botox to cow burps, Horizon journalists covered a wide range of stories in 2015 - and learned some curious facts along the way. Here are our favourites.
When, as a 16-year-old, Adam Noble began measuring nanosilver pollution in his local river, he could hardly have foreseen that it would make him CEO of a 40-strong company before his 24th birthday.
Changing the way science is done in Europe is the first job in setting up the European open science cloud, a huge shared data repository that will enable data from all publicly-funded research to be freely accessible, according to Dr Juan Bicarregui from the Science and Technology Facilities Council, UK.
Swarms of firefighting drones could one day be deployed to tackle hugely destructive megafires that are becoming increasingly frequent in the Mediterranean region because of climate change, arson and poor landscape management.
The challenge of how to rebuild society following conflict is a difficult question that arises all too frequently, but recent studies have demonstrated that putting people at the centre of the process and enabling cooperation on politically neutral issues can help build peace.
Large fires are increasingly common in the Mediterranean region.
Where does one start to fix a broken society?
Destruction of cultural heritage sites can be a war crime as they form part of people's emotional landscape, according to Dr Margarete van Ess.