Biology
![The Power of Prions](https://pup-assets.imgix.net/onix/images/9780691252384.jpg?w=180&auto=format)
The remarkable family of proteins that can make us very ill—but can also be linked to long-term memory, immunity, and the origin of life
![Playing Possum](https://pup-assets.imgix.net/onix/images/9780691260761.jpg?w=180&auto=format)
How animals conceive of death and dying—and what it can teach us about our own relationships with mortality