Last year, the smallest Christmas tree in Spain was only 2 centimeters tall and was put up by the neighbours association Breogan de O Piñeiriño in the northern town of Vilagarcia de Arousa, in Galicia... This year, they have gone even further and with the collaboration of the MERLN Institute in the Neetherlands, they have created the smallest 3D-printed Christmas tree in the world! It's only 10 micrometers tall and can only be seen with an electron microscope. Galician Adrián Seijas was the creator of this tiny Christmas tree