Free images for science projects in the categories anatomy / nature / microbiology / cell biology / equipment / physics / astronomy

Not large catalogues but niche images.

We have included a series of science images which are completely free of charge and copyright-free to download.
Our images are large size (often 720 x 576 pixels)  and high quality -perfect for PowerPoint.
They are in .png format and most have a transparent background which is rare in web images, both  free and purchased. They are ideal for inclusion in PowerPoint or Keynote presentations, newsletters, blogs and websites. There are no watermarks and  no catches, and available for personal, academic or corporate use.

We would appreciate a link or an acknowledgement and would love to hear how you used the images. We will keep adding new images so if you have a suggestion for an image let us know.  Follow us on Twitter to  see what we are adding.

Note: It is not permissible to sell or redistribute images.