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A black-and-white photo of a person’s hands holding a black-and-white barred chicken. The feathers of its breast have been pulled back to reveal a large tumor.
Transmissible Tumors, 1909
Pathologist Peyton Rous made a groundbreaking discovery in the early 20th century, but his work wasn’t widely recognized until more than 40 years later. 
Transmissible Tumors, 1909
Transmissible Tumors, 1909

Pathologist Peyton Rous made a groundbreaking discovery in the early 20th century, but his work wasn’t widely recognized until more than 40 years later. 

Pathologist Peyton Rous made a groundbreaking discovery in the early 20th century, but his work wasn’t widely recognized until more than 40 years later. 

contagious cancer

A tasmanian devil with its nose in the air
Deadly Facial Tumors Spur Tasmanian Devil Evolution: Study
Christie Wilcox, PhD | Jun 16, 2021 | 6 min read
The largest study to date of the animals’ genetics provides robust evidence that they are adapting to survive a highly lethal, contagious cancer scientists feared would cause their extinction.
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