What is this?
Guess…
a) False color picture of a small piece of moon rock
b) Schematic illustration of bone tissue
c) Electron microscopy-based image of an coated tin oxide particle
Deadline: September 30, 2020
and win!
Pure Green Energy 
A Solar charger with 2 USB ports for powerbanks, mobiles, tablets,… Compact, light and high charging speed.
The winner will be drawn from all participants providing the correct answer. There is no entitlement to a prize. Your e-mail address will only be used to run this competition and will be deleted after the winner has been determined.