He established the San Diego Zoo’s cryopreserved Frozen Zoo.

The microbiologist was known for his work on bacterial antibiotic resistance and infectious disease.

A study confirms that the spaces between cells are fluid-filled, rather than tightly packed with connective tissue, but pathologists say the findings’ implications remain to be seen.

No longer considered an inevitability, growing older should be and is being treated like a chronic condition. 

A parasitic nematode relies on a plant’s defense mechanism to invade and grow.

A single amino acid change helps a plant pathogen related to the causative agent of the Irish potato famine infect a new host.

Helicobacter pylori strains that share ancestry with their human hosts are less likely to cause severe disease.

Evidence of early-13th-century intestinal worms found in a medieval castle latrine yields clues about the lives and deaths of crusaders.

Twenty-first century lab reports will include test results read by a new breed of pathologist.