Andrew J. Steinmetz<p>Behold! The punctured vertebrae <a class="hashtag" rel="nofollow noopener" href="https://bsky.app/search?q=%23Dinosaur" target="_blank">#Dinosaur</a> <a class="hashtag" rel="nofollow noopener" href="https://bsky.app/search?q=%23Fossil" target="_blank">#Fossil</a> of an <a class="hashtag" rel="nofollow noopener" href="https://bsky.app/search?q=%23Allosaurus" target="_blank">#Allosaurus</a> caused by the <a class="hashtag" rel="nofollow noopener" href="https://bsky.app/search?q=%23Thagomizer" target="_blank">#Thagomizer</a> of a <a class="hashtag" rel="nofollow noopener" href="https://bsky.app/search?q=%23Stegosaurus" target="_blank">#Stegosaurus</a>. The spikes (seen to illustrate fit) were used for defense. The thagomized allosaurus survived as evidenced by healed bone. <a class="hashtag" rel="nofollow noopener" href="https://bsky.app/search?q=%23Science" target="_blank">#Science</a> <a class="hashtag" rel="nofollow noopener" href="https://bsky.app/search?q=%23PaleoSky" target="_blank">#PaleoSky</a> 🧪 🦕 See: <a href="https://www.researchgate.net/publication/314890308_Evidence_for_Predator-_Prey_Relationships_Examples_for_Allosaurus_and_Stegosaurus" rel="nofollow noopener" target="_blank">www.researchgate.net/publication/...</a></p>