Biology
Impact of olfactory cues on mate selection in insect species
Quick fact
Male silk moths (Bombyx mori) can detect a single molecule of the female's sex pheromone bombykol from miles away, and a female releasing just one nanogram can attract millions of males.
Why this is interesting
Imagine being blind in a crowded room, yet somehow finding exactly the right partner. That's how many insects experience the world—they 'speak' through scent. How does a tiny whiff of a chemical lead to a successful mating?