 Blown that way, Gerard and his team established by some strong transatlantic winds. Gerard Talavera is at the Barcelona Botanical Institute. Go to Nature Communications for the full details of his detective work. You can find a link to that on the programme webpage at bbcworldservice.com. How time flies. That's it for Science in Action this week. The producer was Jonathan Blackwell. I'm Roland Pease. Next week, we're heading to the Royal Society Science Summer Festival.