Porcupine quills are covered in - QI - Quite Interesting

Porcupine quills are covered in their own homemade antibiotics because they frequently fall out of trees and impale themselves.

Can Porcupines Shoot Their Quills?

Vapor-Responsive Shape-Memory Material Based on Carbon Nanotube Sponge Dominated by Pressure-Induced Conformational Transition of Spidroin

November 15, 2022: Vol. XC, No. 22 by Kirkus Reviews - Issuu

Porcupine quills are covered in - QI - Quite Interesting

A Sliver Of Light: Three Americans Imprisoned in Iran: Bauer, Shane, Fattal, Joshua, Shourd, Sarah: 9780544483972: : Books

Can Porcupines Shoot Their Quills?

Coatings, Free Full-Text

Porcupine video: Porcupine fights off a pride of lions (VIDEO).

Study of Impact Resistance Based on Porcupine Quills Bionic Thin-walled Structure

Porcupine Quills and Other Examples of Nature's Foresight

The prickly little myths behind porcupines