Diatoms - Bacillaria paxillifer (right) and Meridion vernale (left and center), magnified, vintage engraved illustration.

- Image ID: C79KMF
Diatoms - Bacillaria paxillifer (right) and Meridion vernale (left and center), magnified, vintage engraved illustration.
Patrick Guenette / Alamy Stock Photo
Image ID: C79KMF