by Zoé de York
From rubber dandelions and toxic crustaceans to anti-vaxxers and the world’s hottest geothermal well, Horizon covered a wide variety of stories in 2017. Here are our 10 favourite science facts that we learned along the way.
![Credit – NSF/LIGO/Sonoma State University/Aurore Simonnet](https://horizon-magazine.eu/sites/default/files/neutron-star_985.jpg)
2. Anti-vaccine groups can serve as early warning signs of disease epidemics.
![Credit – Flickr/ Dave Haygarth](https://horizon-magazine.eu/sites/default/files/measles_985.jpg)
![Credit – Dominguez, Daniel; Brice, Maximilien at CERN](https://horizon-magazine.eu/sites/default/files/lhc_.jpg)
![Credit - Pacific Ring of Fire 2004 Expedition. NOAA Office of Ocean Exploration; Dr Bob Embley, NOAA PMEL, Chief Scientist](https://horizon-magazine.eu/sites/default/files/mariana.jpg)
5. Exposure to air pollution before a school test can negatively affect students’ performance.
![Credit - Sanjeev Kugan on Unsplash](https://horizon-magazine.eu/sites/default/files/pollution_985.jpg)
![Credit – Dawid Zawiła on Unsplash](https://horizon-magazine.eu/sites/default/files/wind_985.jpg)
![Credit – Max Pixel](https://horizon-magazine.eu/sites/default/files/dandelion.jpg)
8. Poplar leaf beetles can ‘taste’ food even after it has reached their gut and entered their blood.
![Credit – ‘Chrysomela populi’ by Aiwok is licensed under CC BY-SA 3.0](https://horizon-magazine.eu/sites/default/files/poplar-beetle.jpg)
![Credit – Chris Baraniuk/ DEEPEGS](https://horizon-magazine.eu/sites/default/files/DEEPEGS_crop_985.jpg)
10. Gold nanoparticles are able to cross the protective membranes around cells.
![Credit - NIST](https://horizon-magazine.eu/sites/default/files/Nanostar_3.jpg)