Chemistry
Olfactory Communication and Pheromone Signaling in Territorial Mammals
Quick fact
A male mouse can scent-mark its territory over 300 times per hour, creating a chemical billboard that announces its presence, health, and social rank to any passing female or rival.
Why this is interesting
Have you ever wondered why dogs insist on sniffing every lamppost on a walk? That lamppost is like a territorial mammal's social media feed—full of messages about who owns the space and who is ready to fight for it.