Wikimedia Commons

a collection of 116,579,058 freely usable media files to which anyone can contribute

Picture of the day

Flowering trees at the bottom of the Eiffel Tower in Paris (France). Today is the March equinox, which marks the beginning of astronomical spring in the Northern Hemisphere.

Media of the day

An experiment showing burning of sulfur in oxygen. A flow-chamber joined to gas washing-bottle (filled with solution of methyl orange) is being used. The product is sulfur dioxide (SO₂) with some traces of sulfur trioxide (SO₃). The 'smoke' that exits the gas-washing bottle is, in fact, a sulfuric acid fog generated in a reaction represented by:

SO₃(g) + H₂O(l) = H₂SO₄(aq).

The oxides are acidic, as can be witnessed by the colour change of the indicator.

Problems playing the file?

Participating

Browsing?: Please use the search box at the top of this page or the links to the rightthe links further down. Feel free to subscribe to our syndicated feeds.
Using?: To fulfill the free license requirements, please read our Reuse guide. You can also request a file.
Identifying?: Have a browse through Category:Unidentified subjects. If you find something you can identify, write a note on the item's talk page.
Creating?: Check out all you need to know at our Contributing your own work guide.
and more!

Discussion?: See the list of discussion pages.; To explore more ways you can contribute to this project, check out the Community Portal.

Wiki Loves Folklore

Upload your local culture photos during Wiki Loves Folklore 2025. Learn more about the contest!

Upload an image to Wiki Loves Folklore

Monthly photo challenge

Take some photos and upload them to meet our monthly thematic challenge, get inspiration and try new subjects! Learn more about the challenges!

Check out this month's challenges

Highlights

If you are browsing Commons for the first time, you may want to start with Featured pictures, Quality images, Valued images or Featured media.

You can also see some work created by our highly skilled contributors in Meet our photographers and Meet our illustrators. You may also be interested in Picture of the Year.