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.
A laser-based broadband internet connection that could help to bridge the so-called digital divide, between people who have internet access and those who do not, has won its inventor first prize in the 2016 edition of the European Union Contest for Young Scientists (EUCYS).
Measuring energy fluctuations in the nucleus of a rare radioactive element could improve the accuracy of GPS from metres to centimetres, while marbled volcanic magma is being used to create eruption countdowns, thanks to groups of European researchers who are pushing the boundaries of timekeeping.
Geochemical stopwatches may also predict volcano eruptions.
SOFT Prize winner Jonathan Naish has developed a virtual reality system.