IYL 2015 opening ceremony
The UNESCO Earth sphere and the Eiffel Tower during the IYL 2015 opening ceremony on 19 January in Paris, France. —OSA Fellow and Director at Large, Xi-Chang Zhang, Rochester, N.Y., USA
The UNESCO Earth sphere and the Eiffel Tower during the IYL 2015 opening ceremony on 19 January in Paris, France. —OSA Fellow and Director at Large, Xi-Chang Zhang, Rochester, N.Y., USA