![](https://wikimediafoundation-org-develop.go-vip.co/wp-content/uploads/2018/03/orange_calandiva_kalanchoe_blossfeldiana-e1534535222624.jpg?w=800&h=600&crop=1)
Add your photos of spring to the sum of all knowledge
The photo repository behind Wikipedia is running a photo contest themed around spring. Here's how you can join.
![](https://wikimediafoundation-org-develop.go-vip.co/wp-content/uploads/2016/08/eth-bib-abessinier_mit_messer_in_der_hand-abessinienflug_1934-lbs_mh02-22-1118-tif1.jpg?w=570&h=423&crop=1)
Switzerland’s ETH-Bibliothek is uploading 134,000 images to Wikimedia Commons
"We are trying to bring the material to where the users are": the uploads from Switzerland's largest public scientific and technical library include photos from noted aviator Walter Mittelholzer, who flew to places around the world in the 1920s and 1930s.