Bacillus thuringiensis (Bt) is a Gram-positive, soil-dwelling bacterium that produces a protein toxic to certain pests, making it a valuable biological insecticide.

Bacteria are single-celled microorganisms that have a wide range of shapes and sizes.

"Human" is a Wikipedia page that explores the biological, social, and cultural aspects of human beings.

The Pasteur Institute (Institut Pasteur) is a French non-profit private foundation dedicated to the study of biology, micro-organisms, diseases, and vaccines.