Special feature: Killer apps in advertising: what's coming next? In countries like France, Finland, Italy, Ireland and Spain, startups are stretching their imagination to come up with a game-changing concept that will shake the market, create jobs and put Europe at the forefront of digital advertising innovation. Looking at the shortlist of projects covered in this issue of the 'Research*EU results magazine', the companies that will manage to stand out will clearly be those able to find the right balance between the respect of privacy, non-intrusiveness, automation, personalised content and... contextualised adverts. This certainly seems worthwhile: by 2020, analysts expect global digital advertising spending to reach EUR 264 billion. This special feature is followed by other highlights across various thematic sections. These include: A bioactive, bioresorbable scaffold to regenerate arteries; Understanding the marketization of Europe; Less precious, more efficient hydrogen fuel cells; How tropical forests can store more carbon; An all-round solution to better face water contamination events; New sorting techniques hold promise for metal recyclers; Quantum computing breakthrough described as ‘the Holy Grail of science’; Protecting core utilities and services through targeted surveillance; New chemical synthesis methods.